SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ------------------ FORM 10-KSB |X| Annual report under Section 13 or 15(d) of the Securities Exchange Act of 1934 (Fee required) For the fiscal year ended: December 31, 1996 Commission file number: 0-26520 NEOPROBE CORPORATION - ------------------------------------------------------------------------------- (Name of Small Business Issuer in Its Charter) DELAWARE 31-1080091 ---------------------------------- ----------------------- (State or Other Jurisdiction of (I.R.S. Employer Incorporation or Organization) Identification No.) 425 Metro Place North, Suite 400, Dublin, Ohio 43017-1367 - ------------------------------------------------ ----------------------- (Address of Principal Executive Offices) (Zip Code) Issuer's Telephone Number, Including Area Code: (614) 793-7500 Securities registered under Section 12(b) of the Exchange Act: None Securities registered under Section 12(g) of the Exchange Act: Common Stock, par value $.001 per share - ------------------------------------------------------------------------------- (Title of Class) Rights to Purchase Series A Junior Participating Preferred Stock - ------------------------------------------------------------------------------- (Title of Class) Check whether the issuer (1) filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes |X| No |_| Check if there is no disclosure of delinquent filers pursuant to Item 405 of Regulation S-B contained in this form, and no disclosure will be contained, to the best of Registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-KSB or any amendment to this Form 10-KSB. |X| The issuer's revenue for its most recent fiscal year was $1,171,186. The aggregate market value of shares of Common Stock held by non-affiliates of the Registrant on February 28, 1997 was $359,925,242. The number of shares of Common Stock outstanding on February 28, 1997 was 22,706,220. The following documents have been incorporated by reference into this Form 10-KSB: Document Part of Form 10-KSB -------- ------------------- Registrant's Proxy Statement for its 1997 Part III Annual Meeting of Stockholders PART I ITEM 1. DESCRIPTION OF BUSINESS GENERAL Neoprobe Corporation, a Delaware corporation ("Neoprobe" or the "Company"), was incorporated in the State of Ohio in 1983 and reincorporated in the State of Delaware in 1988. The Company's executive offices are located at 425 Metro Place North, Dublin, Ohio 43017-1367. Its telephone number at that address is (614) 793-7500. Neoprobe has developed the first patented, intraoperative diagnostic tool that enables real-time cancer detection for most solid-tumor cancers. The Company believes that its proprietary technology, Radioimmunoguided Surgery(TM) (RIGS(R)), enhances the surgeon's ability to locate more precisely and excise more completely occult (hidden) tumors. The RIGS system utilizes a patented hand-held gamma-ray detection probe to locate tumors which have been identified by the Company's proprietary radiolabeled cancer targeting agents. In 1992, the Company began a Phase II clinical trial for patients with primary or metastatic colorectal cancer using the Company's lead product RIGScan(R) CR49. In 1993, the Company opened pivotal Phase III clinical trials for patients with primary colorectal cancer and for metastatic colorectal cancer. During 1995, the Company completed the pivotal Phase III clinical trial for patients with metastatic colorectal cancer with RIGScan CR49. During 1996, the Company submitted applications to the European and U.S. regulatory agencies to request permits to begin marketing the Company's RIGS products for the detection of metastatic colorectal cancer. In addition, the Company has completed a pivotal Phase III clinical trial for the detection of primary colorectal cancer with RIGScan CR49 and anticipates filing similar applications with the European and U.S. regulatory authorities in 1997. Neoprobe is also in various stages of clinical development with the Company's RIGS technology for the intraoperative detection of other solid tumor cancers, and is conducting clinical studies to evaluate the technology for possible therapeutic applications in patients with advanced stages of colorectal and breast cancers (RIGS/ACT) and in patients with HIV/AIDS. Current cancer detection techniques do not always identify all tumors present. Existing presurgical imaging techniques often do not allow the surgeon to clearly distinguish between cancerous and other abnormal tissue. For most solid-tumor cancers, current intraoperative detection is limited to what the surgeon can see and feel. The limitations of these techniques can result in small or occult tumors being left undetected. The Company believes that the RIGS system, by providing precise tumor detection information to the surgeon during the course of surgery, can lead to improved cancer diagnosis and staging of cancer patients and, as a result, improved surgical outcomes. Neoprobe's RIGS system consists of the Neoprobe(R) 1000, a patented hand-held radiation (gamma ray) detection probe, RIGScan radiolabeled cancer targeting agents and a patented surgical method for identifying and locating cancerous tissue. The Company's proprietary targeting agents are monoclonal antibodies or peptides, labeled with a radioactive isotope that emits low energy gamma rays. Before surgery, a cancer patient is injected with one of the RIGScan targeting agents which circulates throughout the patient's body and binds specifically to cancer cell antigens or receptors. The targeting agent is then located during surgery by the Neoprobe 1000 instrument, which emits an audible alarm when a concentration of gamma rays is detected in tissue. The RIGS technology has been used in over 1,500 operations during clinical research in 59 medical institutions worldwide. During 1995, the Company completed testing in a 151-patient, 24-site pivotal Phase III clinical trial for the detection and staging of metastatic colorectal cancer. In addition, the Company has completed testing in a separate Phase III clinical trial for primary colorectal cancer. The Company's analysis of the metastatic clinical trial data indicates that the RIGS system detected hidden tumor in patients with metastatic colorectal cancer which were undetected by traditional treatment methods. The Company has submitted a request for a marketing permit to the European regulatory agencies and a Biologics License Application ("BLA") to the United States Food and Drug Administration ("FDA") for its RIGS product for the detection of metastatic colorectal cancer and intends to file similar applications for the detection of primary colorectal cancer in 1997. -2- CANCER OVERVIEW The American Cancer Society ("ACS") estimates that approximately 1.3 million new cases of cancer were diagnosed and approximately 550,000 deaths were attributable to cancer in the United States in 1996. In addition, the ACS estimates that the direct costs of cancer diagnosis and treatment in the United States are more than $35 billion annually. Despite the significant resources expended on diagnosing and treating this disease each year, cancer remains the second leading cause of death in the United States, following heart disease. The primary methods of treating cancer are surgery, radiation therapy and chemotherapy. Surgery is the primary therapy for most solid-tumor cancers, including colorectal, breast, prostate, ovarian and endocrine cancers. The Company estimates that over 1.0 million cancer surgeries were performed in the United States and Europe in 1996. Surgical oncologists generally believe that substantial reduction of tumor burden can improve a patient's near-term prognosis, that total tumor removal can lead to a major improvement in a patient's long-term prognosis, and that tumors left behind after the surgery are the primary sources of recurrent disease. Thus, in treating cancer patients with solid tumors, the surgeon's goal is, wherever possible, to completely remove tumors. Current postoperative tumor recurrence and survival rates indicate that existing solid-tumor detection methods may be inadequate. The Company believes that there is a need for a more accurate intraoperative tumor detection technique to augment the surgeon's hands and eyes. The principal diagnostic methods available today to locate solid-tumor cancers are preoperative imaging and surgical exploration. The primary preoperative imaging techniques currently available today include computed tomography ("CT"), magnetic resonance imaging ("MRI") and, more recently, immunoscintigraphy. Although immunoscintigraphy, like the RIGS system, uses radiolabeled monoclonal antibodies to detect tumors, the technique is used preoperatively and has not consistently demonstrated the ability to identify tumors smaller than one centimeter. The results of preoperative imaging scans can help give the surgeon a map of the possible location of abnormal tissue. However, these scans often cannot pinpoint abnormalities precisely, and often do not reveal tumors that may become obvious to the surgeon once the operation has begun. Also, CT and MRI scans do not distinguish tumors from other abnormalities, such as scar tissue. Once the operation begins, the surgeon's principal diagnostic tools are his or her hands and eyes. Even with the best available imaging tools, a highly skilled surgeon will often find it difficult or impossible to identify all tumors or to accurately determine "surgical margins"--the boundaries of a tumor. The effectiveness of surgery is also dependent upon the surgeon's ability to determine the extent to which the disease has spread, or metastasized. This "staging" of a patient's disease state is critical to determine whether a patient is a good candidate for surgery and to determine appropriate postoperative care. While Neoprobe is closest to commercialization of its colorectal cancer products for intraoperative tumor detection, it has determined that breast, ovarian, prostate, neuroendocrine/endocrine and gastrointestinal cancers may provide appropriate subsequent RIGS product opportunities. For these cancer types, surgery is the first line of treatment, and Neoprobe believes that the RIGS system can provide surgeons with additional information to help achieve better surgical outcomes. The following table represents the number of new solid-tumor cancer cases for these cancer types in the United States in 1996 as estimated by the ACS: Breast 185,700 Ovarian/Endometrial 76,400 Prostate 317,100 Neuroendocrine and Endocrine 17,000 Gastrointestinal 39,700 Colorectal/Liver 153,400 ------- TOTAL 789,300 ======= -3- RIGS SYSTEM PRODUCTS Neoprobe has developed the first patented, intraoperative diagnostic tool that enables real-time cancer detection during surgery for most solid-tumor cancers. Neoprobe's RIGS system consists of the Neoprobe 1000, a patented hand-held radiation (gamma ray) detection probe, and radiolabeled targeting agents, RIGScan products, and a method for their use. The Company's proprietary targeting agents are monoclonal antibodies or peptides, labeled with a radioactive isotope that emits low energy gamma rays. Prior to surgery, a cancer patient is injected with one of the Company's targeting agents which circulates throughout the body and binds specifically to cancer cell antigens or receptors. The targeting agent is then located during surgery by the Neoprobe 1000 instrument, which emits an audible alarm when a concentration of gamma rays is detected. The Company's proprietary technology also includes a U.S. patent on a method for identifying and differentiating cancerous tissue during surgery. The Neoprobe 1000 Instrument. The Neoprobe 1000 is a patented instrument consisting of a hand-held gamma-ray-detection probe and a software-driven control unit. The probe is a stainless steel tube with an angled tip for ease of maneuverability. The detection device in the tip of the probe is a highly radiosensitive crystal that relays a signal through a preamplifier to the control unit to produce both a digital readout and an audible signal. The detector element fits in a housing approximately the size of a pocket flashlight. At the outset, the audible signal threshold level is adjusted to eliminate the sound when the probe is over normal tissue. During surgery, the surgeon uses the probe as a diagnostic tool to evaluate tissue for presence of cancer. The audible signal indicates the presence of radiolabeled targeting agents concentrated in tissue. Neoprobe's first-generation instrument received FDA 510(k) clearance for marketing as a gamma-radiation detector in December 1986. A modified Neoprobe 1000 also received FDA 510(k) clearance for marketing in June 1992. A second modification to the Neoprobe 1000 received FDA 510(k) clearance in February 1995. Targeting Agents. Each RIGS surgical product uses cancer-specific monoclonal antibodies, antibody fragments, or peptides as targeting agents, called RIGScan products. Antibodies and antibody fragments are proteins that can recognize and selectively attach to specific substances in the body, called antigens. Each type of antibody recognizes and binds specifically to a single type of antigen. The role of natural antibodies in the body's immune system is to detect and defend the body from foreign substances. Monoclonal antibodies ("Mabs") are antibodies produced in the laboratory by cells that are genetically identical and, therefore, yield the same product. Mabs have identical specificity for a single portion of the targeted antigen molecule, such as one associated with cancer cells. Peptides, which are much smaller molecules than monoclonal antibodies, may also be used as targeting agents. A peptide is a compound which is derived from a protein molecule which recognizes and binds specifically to certain sites, called receptors, on the surface of certain cells. The targeting agents used by Neoprobe are the proprietary products of others and have been exclusively licensed by Neoprobe for use with RIGS technology. See "Risk Factors -- No Assurance of Continued Rights to Targeting Agents; Royalty Payments." Neoprobe has identified and obtained exclusive global rights, for use with the RIGS technology, to various antibodies and peptides that target cancer. These targeting agents include the tumor-associated glycoprotein ("TAG") monoclonal antibodies that were developed by the National Cancer Institute of the National Institutes of Health ("NCI/NIH"). The TAG antibodies target a broad range of cancer types, including colorectal, ovarian, prostate, lung, breast and pancreatic cancers. From that class of antibodies, Neoprobe has chosen the whole murine antibody CC49, a second-generation TAG antibody, for its RIGScan CR49 products for colorectal cancer. Monoclonal antibody and peptide technologies are rapidly evolving. Neoprobe follows the field closely in order to take advantage of the latest developments in these technologies for use in the RIGS surgical products. An integral part of Neoprobe's strategy is to enter into agreements to acquire exclusive rights to targeting agents for potential RIGS products. There can be no assurance that any such rights will be available to Neoprobe on acceptable terms or at all. Attaching a radioisotope to a targeting agent produces a radiolabeled targeting agent which is potentially useful for cancer detection. The gamma radiation emanating from the radioisotope is detected by the Neoprobe 1000 instrument. Based on laboratory and clinical studies, Neoprobe has determined that the preferred radiolabel for RIGS -4- targeting agents is the radioactive isotope iodine-125 (125I). This isotope emits low-energy radiation that the Company believes is most effective for intraoperative tumor detection with a hand-held probe. The low-energy radiation of 125I permits the surgeon to identify the cancerous tissue with a level of precision not possible with higher energy isotopes. In order to effectively use 125I, oral doses of sodium iodide are administered to block absorption of the radioactive iodine by the patient's thyroid gland. CLINICAL RESEARCH The RIGS technology has been used in over 1,500 operations during clinical research in 59 medical institutions worldwide. Neoprobe-sponsored clinical research has been conducted at some of the world's leading cancer research and treatment institutions, including Memorial Sloan-Kettering Cancer Center, The University of Pennsylvania Medical Center, the University of Vienna, the Netherlands Cancer Institute, The Cleveland Clinic Foundation, and The Ohio State University ("OSU"). Colorectal Cancer. Neoprobe's first products are applications of the RIGS technology for the detection and treatment of primary and recurrent/metastatic colorectal cancers, using the Neoprobe 1000 and injectable doses of radiolabeled CC49 antibodies, RIGScan CR49. Since 1992, over 600 colorectal cancer patients have participated in several phases of clinical trials with RIGScan CR49. In 1995, the Company completed testing in a 151-patient, 24-site pivotal Phase III clinical trial for the detection and staging of metastatic colorectal cancer. In May 1996, the Company submitted a dossier (i.e. an application requesting a permit to begin marketing and selling) to the European regulatory authorities (i.e. European Agency for the Evaluation of Medicinal Products or "EMEA") requesting permission to begin marketing the RIGScan CR49 product for the detection of metastatic colorectal cancer. In July 1996, the European authorities formally accepted the Company's application after a preliminary review of the application. Under EMEA statutory guidelines the authorities are to complete their review of the application within 210 days of this formal acceptance. However, the guidelines also provide additional time to allow the EMEA to ask questions related to the dossier and time for the applicant to respond to such questions. In November 1996, the Company received from the EMEA a list of questions related to the clinical data submitted in the application. The Company is currently reviewing these questions and preparing to respond to the questions during the second quarter of 1997. In December 1996, the Company submitted its first BLA to the FDA for the detection of metastatic colorectal cancer and received notification from the FDA in February 1997 that the application had been accepted for formal review. In addition, the Company has completed testing in a separate 287-patient, multi-center pivotal Phase III clinical trial for the detection of primary colorectal cancer. Based upon the Company's experience with RIGScan CR49 for the detection of primary colorectal cancer, the Company anticipates filing a dossier to the EMEA and an amendment to the BLA with the FDA for this indication during 1997. There can be no assurance that the Company's RIGS products will be approved for marketing by the FDA or the EMEA, or that any such products will be successfully introduced or achieve market acceptance. See "Risk Factors -- Government Regulation." Breast Cancer. Neoprobe believes that it will be able to apply its RIGS technology to breast cancer. Specifically, benefits may be seen in women who choose lumpectomy as their surgical treatment. Use of the RIGS system to help establish cancer free margins during surgery may result in reduced cancer positive margins identified by pathology after the operation is completed. The incidence of cancer positive or indeterminate margins in lumpectomy procedures has been reported to be 30 percent to 70 percent. Neoprobe has completed three early Phase I/II trials involving 54 breast cancer patients to assess the utility of RIGS technology in breast cancer. Three targeting agents were used in these studies: two TAG antibodies B72.3 and CC49, and the peptide "lanreotide" licensed from Biomeasure Incorporated ("Biomeasure"). The Company believes the results of these trials showed that RIGS could assist the surgeon in finding occult tumor, determining if margins of resection were clear and identifying spread of disease within the breast. The Company believes that the waiting time before surgery required for the two TAG antibodies would limit the application and use of these products in a commercial setting. The clinical trial with the peptide lanreotide showed that the targeting agent, when injected less than three hours prior to surgery, could be used to identify cancer positive margins during surgery. Neoprobe has also acquired global rights to use NeoRx's targeting agent, a fragmented antibody called, NR-LU-10. See "-- License and Technology Agreements." The Company believes that this targeting agent may have applications to breast cancer since among other reasons, the -5- optimal waiting period (i.e. the time between injection of the agent and surgery) may be between 7 to 10 days. During 1996, the Company began a 20-patient Phase I clinical trial to study the safety and appropriate dosage levels of NR-LU-10. After concluding this study, the Company will identify the most appropriate targeting agent for breast cancer and focus its product development efforts for this application. Ovarian Cancer Neoprobe has concluded an ovarian cancer clinical trial using RIGScan CR49 as the targeting agent. The results of the trial show promise for finding additional occult tumors and better assessment of the extent of disease. However, it was concluded that a targeting agent with a shorter clearing time will be required to be fully accepted in the marketplace. The Company believes that NR-LU-10 has the best chance of meeting the Company's criteria for an ovarian cancer targeting agent. The Company has completed preclinical studies for a NR-LU-10 based product and a Phase I/II trial protocol has been written for a clinical trial. Neoprobe intends to initiate a Phase II clinical trial with this targeting agent. Neuroendocrine/Neuroblastoma Cancers. A pilot trial involving six children with neuroblastoma cancer and seven adults with neuroendocrine cancer has been completed using lanreotide as the targeting agent. The studies showed that binding of the peptide to receptors on tumors occurred within 15 to 30 minutes after injection. Surgeons could differentiate normal and tumor tissue using the Neoprobe 1000 instrument. The seven adult neuroendocrine patients did not benefit from the use of RIGS because the lanreotide did not consistently target the tumor. Of the six children with neuroblastoma, the RIGS system found hidden, or occult, tumor in three (50 percent) of the patients. DEVELOPMENT PROGRAM Neoprobe's product development activities fall into three categories: development and testing of RIGScan targeting agents to expand RIGS use to additional cancer types, development and testing of new gamma detecting instruments to expand the use of the RIGS system, and use of the RIGS system for activated cell therapy. There can be no assurance that any of the Company's products in development will be successfully developed, tested or licensed or that any such products will gain market acceptance. See "-- Clinical Research." Targeting Agent Development Program Gastrointestinal Cancers. Neoprobe believes that it may be able to extend the use of RIGScan CR49 to the surgical treatment of stomach cancer. Laboratory studies indicate RIGScan CR49 should target stomach cancer with the same specificity as found in colorectal cancer. Damon Pharm Ltd. ("Damon"), Neoprobe's marketing partner in Korea, plans to commence clinical evaluation of RIGScan CR49 in patients with stomach cancer. Prostate Cancer. Neoprobe believes the RIGS technology can assist in determining lymph node disease status and cancer free margins of resection in prostate surgery. Neoprobe is planning to enter into a Phase I/II evaluation of NR-LU-10 as the targeting agent for prostate cancer to evaluate the ability of the RIGS system to more accurately define margins of primary tumor and identify lymph nodes that contain cancer. Instrument Development Program New Instrument Products. Neoprobe's engineers have completed engineering design and prototype development of an improved Neoprobe instrument. The improved Neoprobe instrument is designed to improve functionality during the surgical procedure. In addition, the Company's engineers have developed prototypes for the next generation Neoprobe instrument. Laparoscopic Probe. Rapid developments in laparoscopic applications are occurring in the medical community because of a growing emphasis on minimally invasive surgery. In keeping with its plan to develop a family of probes that will meet a wide array of cancer diagnostic and treatment needs, Neoprobe has developed a prototype laparoscopic gamma-ray detection probe and intends to request clearance from the FDA for clinical evaluation of the laparoscopic probe. Preclinical testing of the laparoscopic probe is ongoing to determine the optimal design and configuration of this device. In February 1995, Neoprobe received a methodology patent in the United States for use -6- of the laparoscopic probe and in July 1995, the U.S. Patent Office issued a patent for the instrument itself. Foreign patent applications for the laparoscopic probe system are pending. During laparoscopy, a surgeon introduces optical and other instruments into the abdominal cavity through small surgical incisions (six to 20 millimeters). Neoprobe believes the RIGS cancer-detection technology may add an important second source of information because the surgeon loses the ability to examine tissue by touch during laparoscopy and can only see what the camera sees. The Company believes the RIGS laparoscopic system may be beneficial for minimally invasive evaluation of colorectal, prostate, and ovarian cancers. New Instrument Uses. An emerging technique, called intraoperative lymphatic mapping ("ILM"), is creating a new use of the Company's Neoprobe 1000 instrument. Historically, all lymph nodes associated with a melanoma of the skin lesion must be removed in order to assess whether the cancer has spread. With this new technique, physicians use the Neoprobe 1000 gamma detector to precisely locate a single lymph node which, provides information to the surgeon about the extent of the spread of the disease in patients with melanoma. The procedure requires far less surgery than the current approach preventing needless wide removal of lymph nodes and associated side effects for those patients whose disease has not spread. Physicians are evaluating the procedure for melanoma and breast cancer patients, many of whom also currently undergo wide removal of lymph nodes for evaluation of tumor spread. Neoprobe has developed a smaller detector probe with an 11 millimeter detection surface that may be optimal for ILM. Therapeutic Development Program Cancer Therapy (RIGS/ACT) Products. Neoprobe's method for treating colorectal cancer with RIGS/ACT was discovered in the course of clinical trials for its RIGScan CR49 products for colorectal cancer. RIGS/ACT is an experimental form of cellular therapy that uses the patient's immune system to fight cancer. While conducting RIGS clinical trials, Neoprobe's researchers found that lymph nodes identified as positive by the RIGS system contained an unusual abundance of cancer-fighting helper cells (CD4+ lymphocytes). These helper cells secrete chemical messages that are important in directing the body's immune response to disease. Neoprobe's researchers found they could locate, remove, and proliferate the lymph node lymphocytes in the laboratory very quickly and in large numbers. Within 10 to 14 days, 10 billion to 100 billion lymphocytes can be infused into the patient as a cancer treatment, with apparently limited side-effects. These activated cells secrete chemical messages that have the potential to stimulate the body's immune system to attack the cancer. The helper-cell-enriched lymph nodes look no different from those with fewer or no helper cells. The Company believes that except for detection by the RIGS system, there is currently no way available to find these special lymph nodes. Random lymph nodes that were RIGS-negative were also removed during laboratory studies and were subjected to the same process, but they did not show the same ability to stimulate an immune response to cancer. Neoprobe funded a RIGS/ACT pilot study with 10 metastatic colorectal cancer patients at OSU's Arthur G. James Cancer Hospital and Research Institute to test safety and feasibility. All 10 patients were in late stages of the disease and had failed to respond to conventional treatments. The RIGS/ACT was safely administered to all patients, with only a few, manageable side effects such as mild chills and fever. The FDA subsequently authorized expansion of the pilot study to Phase I/II, to include up to 40 patients. Patient enrollment in the expanded study has been completed. The Company believes the preliminary results of this trial suggest that the therapy has the potential to extend the survival of late-stage colorectal cancer patients. Based on these results, Neoprobe is preparing to begin a Phase II clinical trial for RIGS/ACT. In addition, the Company is funding a clinical study which will include patients with late stage breast cancer using RIGS/ACT. There can be no assurance that any RIGS/ACT products will be successfully developed, licensed or marketed. HIV/AIDS Therapy Product. During 1996, the Company funded a 10-patient Phase I clinical study to determine the safety and feasibility of using activated cellular therapy to help boost the immune system of patients with HIV/AIDS. This therapy is similar in some respects to the Company's RIGS/ACT technology, but does not include the use of a RIGS targeting agent. Researchers determined that the same immune mechanism used in cancer ACT may be exploited to potentially treat viral diseases such as AIDS. The Company acquired rights to the HIV/AIDS cellular therapy technology from Cira Technologies, Inc. in 1996. See "--License and Technology Agreements". -7- MARKETING AND DISTRIBUTION In September 1996, the Company executed an exclusive worldwide License and Distributorship Agreement ("Marketing Agreement") with United States Surgical Corporation ("USSC"). The Marketing Agreement gives USSC exclusive worldwide sales and marketing rights (excluding Korea, Thailand, Taiwan, Malaysia, and Singapore) for Neoprobe's RIGS surgical cancer detection products. USSC will provide training to surgeons and professional education worldwide for these RIGS products. USSC paid $2 million to the Company upon execution of the marketing agreement and will pay an additional $3.5 million upon receiving notification of marketing approvals in Europe and the U.S. The Company will pay USSC a commission on all RIGS surgical cancer detection products and USSC will make payments to the Company based on commissions collected to fund research and development on future RIGS surgical cancer detection products. USSC will also pay the Company a royalty for all sales of RIGS disposable cancer detection products sold by USSC. The Marketing Agreement has an initial term of five years after receipt of marketing approvals from the FDA and the EMEA and USSC has a renewal option for successive five year terms and the right to terminate the agreement without cause on one year notice. USSC may also terminate the Marketing Agreement, if Neoprobe does not receive marketing approvals from the FDA and the EMEA and if such termination is during the first two years of the agreement, Neoprobe will be required to refund the initial $2 million payment. Initial marketing efforts in the United States will be directed to the approximately 500 teaching hospitals and cancer institutions, whose adoption of the RIGS system may promote its general use by surgeons. These institutions perform a large number of cancer surgeries and have historically been willing to purchase and use new technologies. In addition, these institutions employ a large number of influential individuals in the cancer field, whose support could favorably influence RIGS product sales. Twenty-eight of these institutions are or have been involved in Neoprobe's clinical studies. Neoprobe expects that its marketing efforts will ultimately be directed to the approximately 1,600 largest institutions in the United States (those with 200 or more beds per institution). Neoprobe also plans to develop markets for RIGS products in Europe, focusing on similar categories of physician specialists and institutions. Neoprobe's success will depend upon wide acceptance of the RIGS technology as a cancer diagnostic and treatment technology. Neoprobe and USSC, must educate the medical community on the utility and proper use of the RIGS technology. Neoprobe's medical and scientific researchers have been educating the medical community about the RIGS system through trade shows, symposia, articles and scientific abstracts published in select medical journals, and other activities. Neoprobe intends to continue these activities prior to commercialization of the first RIGS product, with the goal of becoming the leader in the development and commercialization of intraoperative diagnostic products to assist surgeons in the treatment of solid-tumor cancers. Although Neoprobe will seek to establish the RIGS method as standard surgical procedure for treatment of solid-tumor cancers, there can be no assurance that Neoprobe's proposed products will achieve market acceptance. See "Risk Factors -- Dependence upon Principal Product Line; Uncertainty of Market Acceptance." In August 1995, the Company signed a Strategic Marketing Agreement with Damon granting exclusive marketing and distribution rights in Korea for RIGScan products. Under the agreement, Damon will conduct clinical trials using RIGScan products, and will submit regulatory applications for marketing the products in Korea. The Company, in turn, will provide RIGS products at agreed upon transfer prices, and will receive a royalty on all sales of these products. Damon purchased 154,575 shares of Common Stock from the Company at market-related prices. Damon also paid an option fee to the Company in October 1995 for an option to market RIGScan products in certain southeast Asian countries. During 1996, Damon exercised the option and paid the additional license fee for marketing rights in the countries of Taiwan, Thailand and Singapore. The agreement may not be terminated except for a material breach by either party. In February 1997, Damon obtained regulatory approval in Korea and commercial distribution of RIGScan CR49 began in that country. In 1995, Neoprobe entered into distribution service agreements with Syncor Corporation ("Syncor") and MDS Nordion S.A. ("Nordion-Europe"). Syncor will provide distribution services for RIGScan products in North America and certain Asian markets. The distribution services include order entry and delivery of RIGScan -8- products to nuclear pharmacies in the aforementioned territories. In addition, Syncor has agreed to assist in the marketing of RIGScan products to nuclear medicine departments and in the training of nuclear medicine physicians in the use of RIGScan products. The agreement with Nordion-Europe covers similar distribution services for RIGScan products in Europe, Africa, and the Middle East. In addition, Nordion-Europe has agreed to handle final release testing of RIGScan products in accordance with European regulatory guidelines and to provide customer billing services for RIGScan products at Neoprobe's request. Both Syncor and Nordion-Europe will be paid fees based upon the number of doses of RIGScan which are delivered to hospitals in their respective distribution territories. The Company believes that the service agreements with Syncor and Nordion-Europe position Neoprobe to deliver RIGScan products to hospitals through established radiopharmaceutical channels. MANUFACTURING Manufacture of Targeting Agents. In March 1995, Neoprobe entered into a manufacturing and supply agreement with Gist-brocades Bio-Intermediair B.V., a Dutch corporation ("Bio-Intermediair"), for the production of monoclonal antibodies to use in conjunction with Neoprobe's RIGS technology, pending expansion of the facility of Neoprobe's wholly-owned subsidiary, MonoCarb. Under this contract, Bio-Intermediair manufactures CC49 Mab for the Company in compliance with Good Manufacturing Practices ("GMP"). The term of the agreement is three years after regulatory approval to market a CC49 based product in the United States or Europe and may be automatically extended for one year on each anniversary of the agreement. The agreement may be terminated by Neoprobe or by Bio-Intermediair upon specified notice or on a material default. Bio-Intermediair is a provider of GMP manufacturing services, specializing in pilot to large scale cell culture and production of biopharmaceuticals. Bio-Intermediair has recently been reinspected by the Dutch regulatory agency and found to be in full compliance with European GMP, satisfying member requirements of the Pharmaceutical Inspection Convention. This same agency certified Bio-Intermediair and its facility to produce monoclonal antibodies, and other biological products for human clinical applications. This certification is accepted by the member countries of the Pharmaceutical Inspection Convention, including most of the European countries and Australia. The FDA will make a similar inspection before it approves Neoprobe's BLA for its first RIGScan CR49 product. MonoCarb is located in Lund, Sweden, and leases a facility there for the production and purification of monoclonal antibodies used as blood grouping reagents. MonoCarb currently holds an ELA from the FDA to produce commercial biologics for its blood grouping reagents. Neoprobe intends to use this production facility and related equipment to produce future products for use in connection with Neoprobe's RIGS technology. A small state-of-the-art filling facility has been installed at MonoCarb to fill vials for subsequent radiolabeling.. See "Risk Factors -- Limited Manufacturing Capacity and Experience." Radiolabeling. In April 1993, Neoprobe entered into a clinical and commercial supply agreement with MDS Nordion ("Nordion"), one of the largest suppliers in the world, of radioisotopes to nuclear medicine departments for the radiolabeling of Neoprobe's monoclonal antibodies with 125I for clinical trials and commercial sale after regulatory approval to market such products has been granted. Pursuant to this agreement, Neoprobe paid Nordion an initial cash payment, and an additional sum was paid upon completion of process validation of the manufacture of the radiolabeled antibody in July 1994. Neoprobe has made additional cash payments to Nordion to increase the production capacity in this facility. Nordion began shipping radiolabeled CC49 for Neoprobe's Phase III studies in August 1994. The term of the agreement is for a minimum of three years after Neoprobe is granted approval to market in the United States or Europe, subject to renewal and early termination in certain events. Additionally, Neoprobe has agreed to purchase certain quantities of the radiolabeled antibody throughout the term of the agreement at prices already set or to be determined based on current information at the time of commercial approval. In 1994, Neoprobe (Israel) was organized under the laws of the State of Israel as a subsidiary of the Company to construct and operate a radiolabeling facility for the Company's targeting agents. A Facility Agreement has been entered into among the Company, Neoprobe (Israel) and Rotem, under which Rotem will manage the facility and has a minority equity interest in Neoprobe (Israel), which it can increase under certain circumstances. The design and engineering work has been completed on the facility and construction began in February 1996. The parties currently intend to have the facility completed and operational in the third quarter of 1997. -9- Neoprobe 1000. In August 1996, the Company entered into a Manufacturing and Supply Agreement with RELA, Inc. of Boulder Colorado ("RELA"), a developer and manufacturer of medical devices. Under the agreement RELA will manufacture Neoprobe 1000 instruments for the Company based on forecasts provided to RELA. The Company may decide to use a separate third party manufacturer for the next generation Neoprobe system. LICENSE AND TECHNOLOGY AGREEMENTS The Dow Chemical Company. In 1991 and 1992, Neoprobe entered into agreements with The Dow Chemical Company ("Dow"), which at that time was a principal stockholder of the Company, pursuant to which Dow and Neoprobe agreed to coordinate their research and development activities relative to the commercialization of RIGS products and Neoprobe was granted certain rights. Under the agreements, Dow (i) granted to Neoprobe an exclusive global, commercial sublicense to use CC49 as a RIGS technology product, (ii) agreed to grant to Neoprobe, upon its request and after approval by NCI/NIH, a sublicense to any other antibody under Dow's commercial license agreement with NCI/NIH, (iii) granted to Neoprobe an exclusive global license to Dow's proprietary iodination technology which may be used by Neoprobe to radiolabel antibodies for RIGS system products and (iv) licensed or sublicensed certain other targeting agents for use as RIGS technology products. The agreements provide that Neoprobe is obligated to pay Dow royalties on certain RIGS system antibody product revenues, part of which compensates Dow for royalties payable under Dow's license agreement with NCI/NIH. Additional royalties may be payable if Dow's technology is used in the commercial production of RIGS system products. If Neoprobe fails to comply with certain financial and timing requirements of the sublicense, the rights under such sublicense may revert back to Dow. Neoprobe's sublicense of CC49 from Dow is subject to a commercial license agreement between Dow and NCI/NIH under which NCI/NIH reserved the right to use CC49 for government purposes. If the Dow-NCI/NIH commercial license agreement is terminated for any reason, including a default by Dow, the Dow-NCI/NIH commercial license agreement allows Neoprobe to apply for a license for antibodies previously granted by Dow to Neoprobe (subject to approval and acceptance by NCI/NIH). If the Dow-NCI/NIH commercial license agreement is terminated, the Dow-Neoprobe agreement allows Neoprobe to either obtain a license directly from NCI/NIH (subject to approval and acceptance by NCI/NIH) or to terminate provisions of the Dow-Neoprobe agreement that relate to the Dow-NCI/NIH commercial license agreement. In May 1996, Neoprobe and Dow executed an agreement under which Dow granted Neoprobe global rights to certain technology related to targeting agents, radiolabeling and radioimmunotherapy products developed by Dow researchers. Upon completion, the global licenses will provide Neoprobe with global access to technology covered by issued patents for use in the development of RIGS and radioimmunotherapy products. Dow received 124,805 shares of Common Stock in exchange for the technology rights. Dow currently holds 847,920 shares of Common Stock. The Ohio State University Research Foundation ("OSURF"). Neoprobe has had a long term relationship with OSU and OSURF involving the cooperation of OSU personnel at OSU's medical and veterinary facilities for clinical research on potential products. OSURF and Neoprobe have a clinical research agreement (the "OSURF Agreement") that grants Neoprobe, among other things, exclusive global rights through March 1997 to any concepts and/or products that develop as the result of Neoprobe's sponsored clinical research at OSU or its affiliated research facilities. Pursuant to the OSURF Agreement, rights to inventions or discoveries that are developed with inventive contribution by an OSURF employee or agent belong to OSURF and OSURF has the exclusive right to inventions or discoveries, including patent claims with respect thereto. Neoprobe has an exclusive global license with respect to OSURF's interest under all such technology. In the event OSURF does not elect to file or maintain an application or patent, Neoprobe has the right to patent such inventions or discoveries. Neoprobe will pay OSURF a royalty on the revenues of products developed through such Company-sponsored research. Minimum and maximum royalty rate ranges have been established for products with the particular royalty rates to be negotiated. Individual protocols under the contracts with OSURF define, with the agreement of both parties, the scope of each project undertaken and the financial support to be provided by Neoprobe. The Company and OSURF have agreed in principal to continue their relationship under the terms and conditions similar to the expiring agreement. A new agreement is expected to be negotiated in the second quarter. As of February 28, 1997, 22 OSU personnel, nine of whom have M.D. or Ph.D. degrees, were involved in Neoprobe's RIGS system research. -10- NeoRx Corporation. In May 1993, Neoprobe entered into a sublicense option agreement with NeoRx Corporation ("NeoRx") to acquire the exclusive worldwide right to make, use and sell any product that incorporates the murine monoclonal IgG2b antibody and any version thereof designated NR-LU-10 as a RIGScan product. As consideration for the option, Neoprobe paid a fee to NeoRx. Under the terms of the option agreement and a subsequent amendment, Neoprobe was to enter into a supply agreement with a supplier satisfactory to both Neoprobe and NeoRx. In March 1995, Neoprobe exercised its option under the sublicense agreement and made an additional payment to NeoRx. Neoprobe must also pay royalties on sales of any product incorporating the antibody as well as an annual fee to maintain exclusivity of the agreement. The sublicense will have the same perpetual term as NeoRx's license with its licensor, and if such license is terminated, NeoRx is obligated to assist Neoprobe in obtaining a license from such licensor. The sublicense is conditioned on Neoprobe carrying out, at its own expense, the development and marketing of one or more products that incorporate the antibody to the point of filing a PLA with the FDA within four years; this deadline may be extended by mutual agreement of NeoRx and Neoprobe if Neoprobe demonstrates reasonable due diligence with respect to this research program. Neoprobe currently intends to research the use of the NR-LU-10 antibody in connection with the diagnosis and treatment of ovarian, prostate and lung cancers. Biomeasure, Incorporated and Kinerton Limited. In August 1994, Neoprobe entered into a license agreement with Biomeasure which grants Neoprobe the exclusive worldwide right to make, use and sell surgical cancer detection and treatment products that incorporate lanreotide, a peptide targeting agent. Concurrently, Biomeasure also granted Neoprobe a license to make, use and sell a diagnostic product using the compound. The license agreements have minimum terms of 10 years and require Neoprobe to file regulatory applications for products using lanreotide within certain time frames. Neoprobe entered into a supply agreement with Kinerton Limited of Ireland ("Kinerton"), at the same time, under which Kinerton will supply Neoprobe with its requirements of lanreotide at the lowest price charged to Kinerton's commercial customers. The supply agreement has the same term as the license agreements with Biomeasure. Neoprobe currently intends to research the use of lanreotide in connection with the diagnosis and treatment of breast and neuroendocrine/endocrine cancers. XTL Biopharmaceuticals, Ltd. In February 1996, Neoprobe and XTL Biopharmaceuticals Ltd. ("XTL") completed agreements including investment and research agreements whereby XTL granted Neoprobe the exclusive worldwide option to license XTL developed products in certain disease fields. XTL has developed technology to produce mice that contain human immune systems. Fully human antibodies can be developed from these mice. The mice also can be used to model human diseases such as cancer and HIV. Neoprobe's first use of this technology will be to produce a cancer model that can be used to test RIGS/ACT optimization schemes. Neoprobe acquired $1.5 million in convertible debentures of XTL (the "XTL Debentures") convertible into approximately 15 percent equity interest in XTL and a warrant affording Neoprobe the option to acquire an additional 10 percent equity interest in XTL. To accomplish the purchase of the XTL Debentures and to fund the product development activities contemplated under the research agreement, Neoprobe issued to XTL 125,000 shares of Neoprobe's Common Stock. Peptor, Ltd. In February 1996, Neoprobe and Peptor Corp., a wholly owned subsidiary of Peptor, Ltd. ("Peptor"), formed a joint venture limited liability company ("JV"), which is intended to commercialize radiolabeled targeting agents developed by Peptor and supplied by Peptor to the JV. Neoprobe (Israel) will radiolabel the targeting agents for the JV. The JV is to seek funding from a foundation to support a portion of the JV's research activities and to the extent that these funds are inadequate to meet the mutually agreed to research program, the parties will equally contribute to the JV. Cira Technologies, Inc. Dr. Richard Olsen, an emeritus professor of veterinary pathobiology at OSU, and Dr. John Ridihalgh, Chairman of the Company, invented a process for treating chronic infectious and/or autoimmune diseases using activated cellular therapy, conducted tests of their invention on animals and filed an application for a United States patent thereon. In March 1996, Dr. Ridihalgh and the Company, represented by a committee of independent directors, agreed that a newly organized corporation, Cira Technologies, Inc.("Cira"), would exploit the process. The Company received 10 percent of the originally issued shares in Cira and the remainder was divided among Drs. Ridihalgh and Olsen and their colleagues, including a director of the Company who acted as their patent counsel. The Company and Cira also executed a Technology Option Agreement, under which Cira granted the Company an option to acquire exclusive world-wide licenses to Cira's activated cellular therapy for the treatment of human immunodeficiency virus infected patients and chronic infectious and/or autoimmune disease in humans and -11- the Company agreed to support a Phase I clinical trial of this process on up to 40 patients at a cost not to exceed $500,000. The Company and Cira also cross licensed improvements in activated cellular therapy. In addition to technology rights, the Company obtained an option to increase its interest in Cira by 15%. The exercise price of this option is 15% of the fair market value of Cira's outstanding securities on the earlier of the third anniversary of a license agreement under the Technology Option Agreement, or the commencement of a pivotal clinical trial study, subject to a minimum of $1.95 million and a maximum of $4.5 million. PATENTS AND PROPRIETARY RIGHTS Proprietary protection for Neoprobe's products is important to Neoprobe's business. Neoprobe's policy is to seek to protect its technology by, among other things, filing patent applications for technology that is considered important to the development of its business. Certain aspects of Neoprobe's RIGS technology are claimed in the United States in U.S. Patent No. 4,782,840, which, provided that required maintenance fees are paid, expires in 2005. Under the Patent Restoration Act, Neoprobe is eligible to apply for a three to five-year patent extension. The Company plans to apply for an extension within 60 days of FDA marketing approvals of its first RIGS system product. The earliest of those patents expires in 2006, provided that the required maintenance fees are paid. The detection instrument patents concern the manner in which the RIGS system communicates with surgeons and the unique manner in which background radiation is distinguished from radiation being emitted from tumors. Neoprobe holds 10 patents issued by the United States Patent Office covering RIGS technology, holds one additional patent jointly with OSURF and numerous foreign patents. Neoprobe has additional patent filings pending in the United States, Canada, Mexico, Argentina, Brazil, South Korea, China, Russia, India, Taiwan, Europe, Australia, Israel and Japan. The patents Neoprobe is seeking with these applications would provide Neoprobe with certain rights with respect to (i) the Neoprobe 1000 detection instrument and other detection instruments; (ii) certain processes to evaluate neoplastic tissue; and (iii) a technique relating to activated cellular therapy. The timing of issuance of these patents cannot be predicted; it has been Neoprobe's experience that the period between filing and issuance of a patent can be two years or longer. Neoprobe estimates that the costs to prosecute these patent applications to their ultimate resolutions (i.e., issuance or abandonment) will not be material. The patent position of biotechnology firms, including Neoprobe, generally is highly uncertain and involves complex legal and factual questions. To date, a consistent and predictable application of United States patent laws regarding the grant and interpretation of patent claims in the area of biotechnology has not evolved. Moreover, the technology applicable to Neoprobe's monoclonal antibody products is developing rapidly. Patents have been issued to other pharmaceutical, biotechnology, and biopharmaceutical companies in the same area of technology as that used by Neoprobe. In addition, potential competitors may have filed applications for, or may have been issued patents or may obtain additional patents and proprietary rights relating to, products or processes in the same area of technology as that used by Neoprobe. The scope and validity of these patents and applications, the extent to which Neoprobe may be required to obtain licenses thereunder or under other proprietary rights, and the cost and availability of licenses are uncertain. There can be no assurance that Neoprobe's patent applications will result in additional patents being issued or that any of Neoprobe's patents will afford protection against competitors with similar technology; nor can there be any assurance that any of Neoprobe's patents will not be designed around by others or that others will not obtain patents that Neoprobe would need to license or design around. See "Risk Factors - -- Patents, Proprietary Technology and Trade Secrets." Neoprobe also relies upon unpatented trade secrets. No assurance can be given that others will not independently develop substantially equivalent proprietary information and techniques, or otherwise gain access to Neoprobe's trade secrets, or disclose such technology, or that Neoprobe can meaningfully protect its rights to its unpatented trade secrets. Neoprobe requires its employees, consultants and advisers to execute a confidentiality agreement upon the commencement of an employment or consulting relationship with Neoprobe. The agreement provides that all confidential information developed or made known to the individual during the course of the relationship will be kept confidential and not disclosed to third parties except in specified circumstances. In the case of employees, the agreements provide that all inventions conceived by the individual will be the exclusive property of Neoprobe. There can be no assurance, however, that these agreements will provide meaningful protection for Neoprobe's trade secrets in the event of an unauthorized use or disclosure of such information. -12- GOVERNMENT REGULATION The production and marketing of Neoprobe's products and its research and development activities are subject to detailed and substantive regulation by governmental authorities in the United States and other countries. In the United States, drugs, biologic products, and medical devices are regulated by the FDA. The Federal Food, Drug, and Cosmetic Act (the "FDC Act"), the Public Health Services Act (the "PHS Act"), the respective regulations promulgated thereunder, and other federal and state statutes and regulations, govern, among other things, clinical testing, manufacture, labeling, packaging, marketing, distribution and record keeping in order to ensure that the Company's products are safe and effective for their intended use. Noncompliance with applicable requirements can result in fines, civil penalties, injunctions, suspensions or loss of regulatory approvals, recall or seizure of the Company's products, operating restrictions, import detentions, government refusal to approve product export applications, 510(k)s, PMAs, BLAs, PLAs or ELAs, or to allow the Company to enter into supply contracts, and criminal prosecution. The FDA also has the authority to revoke previously granted licenses. See "Risk Factors -- Government Regulation." The Company's biologic products will require a regulatory license to market by the FDA and by comparable agencies in foreign countries. The process of obtaining regulatory licenses and approvals is costly and time consuming, and the Company has encountered and may continue to encounter delays in the completion of testing for certain proposed products. Future delays could result from, among other things, slower than expected patient enrollment rates, difficulties in analyzing data from clinical trials or in validating manufacturing processes, changes in regulatory requirements, a longer than expected FDA review process and possible additional analysis and reconciliation of any perceived differences between data generated in Phase I/II and Phase II clinical trials and data generated in Phase III clinical trials. In addition, although certain members of management and significant employees and consultants have had substantial experience in conducting and supervising clinical trials for pharmaceutical and biomedical products, the Company has not previously submitted a BLA to the FDA or a dossier to European regulatory agencies for approval of a license to market its products. Even after FDA approval of applicable licenses, use of the Company's products could reveal side effects that, if serious, could result in suspension of existing licenses and delays in obtaining licenses in other jurisdictions. See "Risk Factors -- Government Regulation." The steps required before a biologic agent may be marketed in the United States include (i) preclinical laboratory and animal testing; (ii) submission to the FDA of an Investigational New Drug ("IND") application, which must become effective before human clinical trials may commence; (iii) adequate and well controlled human clinical trials to establish the safety and efficacy of the biologic for its intended use; (iv) submission of a BLA to the FDA; and (v) FDA approval of these applications and each production lot before any sale or shipment of the biologic. Until 1996, the manufacturer of a biologic product, whether or not the manufacturer is the developer of the product, had to be licensed by the FDA through submission and approval of an Establishment License Application ("ELA") that related to the specific biologic for which a Product License Application ("PLA") was sought. A PLA and ELA were submitted, reviewed and approved in tandem and were issued by the FDA only to the same party (a "holder"). Consequently, the holder of the PLA had to be both the manufacturer of the product and the holder of the ELA applicable to the manufacture of that product. In May 1996, the FDA promulgated the elimination of the requirement for an ELA for "well characterized" biotechnology products subject to licensure under the PHS Act. This new ruling has eliminated the requirement for each manufacturer to hold both the PLA and ELA and has combined these licenses into a BLA. Under the new rules, some information previously required as part of the ELA will be required as part of the BLA as well. However, for a well characterized biotechnology product, much of the information previously required as part of the ELA will not be required in the BLA. In addition, under these rules, each manufacturing facility must undergo a pre-approval inspection by the FDA to assess its suitability and compliance with GMP and periodic inspections thereafter. Once approved, any changes in the manufacturing process, equipment, facilities or product specifications must be pre-approved by the FDA and may require additional clinical data to validate the changes prior to allowing their implementation. Under this final rule, the Company, as the developer of the product, will hold the BLA. -13- Pre-clinical tests include laboratory and animal studies to assess product characteristics and the potential safety and utility of each product. The results of the preclinical tests are submitted to the FDA as part of an IND application and are reviewed by the FDA prior to the commencement of human clinical trials. Unless the FDA objects to an IND application, the application will become effective 30 days following its receipt by the FDA. There can be no assurance that submission of an IND application will result in FDA allowing the commencement of Neoprobe's clinical trials. Clinical trials involve the administration of the investigational radiolabeled targeting agent to volunteer cancer patients under the supervision of a qualified principal investigator. Clinical trials are conducted in accordance with protocols that detail the objectives of the study, the parameters to be used to monitor safety, and the efficacy criteria to be evaluated. Each protocol must be submitted to the FDA as part of the IND application. Further, each clinical study must be conducted under the auspices of an independent institutional review board ("IRB") at the institution at which the study will be conducted. The IRB will consider, among other things, ethical factors, the safety of human subjects, and the possible liability of the institution. Clinical trials are typically conducted in three sequential phases but the phases may overlap. In Phase I, the targeting agent is initially introduced into human subjects (15-50) and is tested for safety (adverse effects), dosage, distribution, and metabolism. Phase II involves studies in a limited population of patients (50-200) affiliated with a specific disease (i) to determine the preliminary efficacy of the drug for specific, targeted indications; (ii) to determine optimal dosage; and (iii) to identify possible adverse effects and safety risks. When a product is found to be effective and has an acceptable safety profile in Phase II studies, Phase III trials are undertaken to evaluate further clinical efficacy and to test further for safety within an expanded patient population (200-2,000 or more) at geographically dispersed clinical study sites. Before conducting Phase III trials, the FDA must approve Neoprobe's methodology and research goals, which are summarized in a protocol submitted by Neoprobe for FDA consideration. There can be no assurance that the FDA will approve any protocol submitted by Neoprobe in the future or that a Phase III trial will meet FDA data integrity, Good Clinical Practice ("GCP"), or protocol compliance requirements. A Phase III trial must be conducted in compliance with the protocol and GCP regulations to have the requisite data integrity to be accepted by FDA as evidence of safety and effectiveness. Neoprobe or the FDA may suspend clinical trials at any time if it is concluded that the patients are being exposed to an unacceptable health risk, or because of a study design or implementation error. Such suspension may have a material adverse effect on the Company's business, financial condition and results of operations. The pivotal Phase III clinical studies, on which the FDA bases its evaluation of the safety, efficacy and potency of a biologic product, must be performed using products produced at the manufacturing facilities which are seeking the BLAs. Any significant changes in the conduct of the clinical study, in the manufacturing process or in the facilities during the Phase III clinical trials or after FDA approval likely will require additional clinical studies before they are approved. The results of the preclinical studies, clinical studies, and other required information are submitted to the FDA in the form of a BLA for approval of the marketing and commercial shipment of the biologic. Neoprobe must pay a $200,000 or more user fee to file the BLA and the FDA may refuse to file the BLA and require additional testing before filing the BLA. This and other user fees, though not insubstantial sums, are an insignificant fraction of the cost of developing, testing, seeking and, if successful, obtaining FDA approval of a BLA. The testing and approval process is likely to require substantial time and effort, and there can be no assurance that any approval will be granted on a timely basis, if at all. The FDA may deny a BLA if applicable regulatory criteria are not satisfied, require additional testing or information, or require post-marking testing and surveillance to monitor the safety or efficacy of Neoprobe's products. Notwithstanding the submission of such data, the FDA may ultimately decide that the application does not satisfy its regulatory criteria for approval. Finally, product approvals may be withdrawn if compliance with regulatory standards is not maintained or if a problem occurs following initial marketing. The process of completing clinical testing usually takes a number of years and requires the expenditure of substantial resources. Additionally, the length of time it takes for the FDA to evaluate an application for marketing approval varies considerably, as does the amount of preclinical and clinical data required to demonstrate the safety and efficacy of a specific product. The FDA may require additional clinical studies which will take the Company several -14- years to perform. The FDA now takes a minimum of one year to review biologic applications after filing under the user fee policy. Twelve months after acceptance for filing, Neoprobe should receive a letter either approving the PLA, or not approving it and citing deficiencies that must be addressed. No further action will be taken by the FDA until Neoprobe fully responds to the issues in the letter. The length of the review period may vary widely depending upon the nature and indications of the proposed product and whether the FDA has any further questions or requests any additional data. Also, the FDA will require post-marking reporting and surveillance programs to monitor the side effects of the products. Some of Neoprobe's products may be eligible for accelerated BLA consideration. The FDA may expedite an approval for treatment of a serious and life-threatening disease, if the drug or biologic provides a benefit over existing treatment and meets certain testing objectives. Post-marking studies would be required and the FDA could restrict distribution of a product receiving accelerated approval to market. There can be no assurance that any of Neoprobe's potential products will be approved by the FDA or approved on a timely or accelerated basis or that any approvals received will not subsequently be revoked or modified. In addition, future regulations and changes in FDA policies could affect Neoprobe's operations or impose additional requirements before products are approved. Neoprobe submitted a dossier to the European regulatory agencies in May 1996, and a BLA to the FDA in December 1996, for its RIGS product for the detection of metastatic colorectal cancer. There can be no assurance that the FDA will review the BLA in a timely manner, that the clinical data collected in the Company's Phase III pivotal clinical trials will be sufficient to support FDA approval of a license for the CR49 product, or that the FDA will not require additional information and data, including additional clinical studies. Failure to obtain a BLA and to commence marketing the RIGScan CR49 product on a timely basis would have an adverse effect on the Company's business, financial condition and results of operations, including but not limited to, jeopardizing the Company's rights under certain of its current or contemplated contractual arrangements for the supply of necessary components of its RIGS system products. The FDA strictly controls the marketing of any approved biologic product in terms of approving the lot release of each production batch of product and pre-approval of all labeling, promotional materials and press releases. Among conditions for BLA approval is the requirement that the prospective manufacturer's quality control and manufacturing procedures conform to GMP, which must be followed at all times. In complying with standards set forth in these regulations, Neoprobe must continue to expend time, funds, and effort to ensure full compliance. If Neoprobe wishes to modify or change its manufacturing process or facility it must seek approval to do so through an amendment to its BLA which may require additional clinical testing. Even after initial FDA approval has been obtained, further studies may be required to provide additional data on safety and further studies will be required to gain approval for the use of a product as a treatment for a clinical indication other than that for which the product was initially tested. Also, the FDA may require post-marketing testing and surveillance programs to monitor the product's effects. Undesirable side effects resulting from the use of pharmaceutical products may prevent or limit the further marketing of the products. Neoprobe applied to the FDA to clarify regulatory jurisdiction over the Company's combination RIGS instrument/targeting agent products. The FDA's response was to appoint jurisdiction over the Company's marketing submissions to the center which evaluates the targeting agent. The Company may now submit a BLA (in the case of a biologic such as CC49) or New Drug Application ("NDA") (in the case of a peptide such as lanreotide which is considered a drug), obviating the need for a second separate submission for the instrument. This decision streamlines the review process for the Company's RIGS products by requiring marketing submission to a single FDA evaluation center, the Center for Biologics Evaluation and Research ("CBER") and Center for Drug Evaluation and Research ("CDER"). In addition to regulations enforced by the FDA, the manufacture, distribution and use of Neoprobe's products are also subject to regulation by the Nuclear Regulatory Commission, the Department of Transportation and other federal and state, and local government authorities. Neoprobe and/or its manufacturer of the radiolabeled antibodies must obtain a specific license from the Nuclear Regulatory Commission to manufacture and distribute radiolabeled antibodies as well as comply with all applicable regulations. Neoprobe must also comply with Department of Transportation regulations on the labeling and packaging requirements for shipment of radiolabeled antibodies to licensed -15- clinics, and must comply with federal, state and local governmental laws regarding the disposal of radioactive waste. There can be no assurances that the Company will obtain all necessary licenses and permits and be able to comply with all applicable laws, the failure of which would have a materially adverse effect on the Company's business, financial condition and results of operations. Before marketing its products in Western Europe, Neoprobe will be required to receive the approval of the European Council or European Commission and the appropriate governmental agencies in each of the respective countries. For marketing outside the United States, Neoprobe is also subject to foreign regulatory requirements governing human clinical trials, pharmaceutical sales and marketing approval of its products. Whether or not FDA approval has been obtained, approval of a product by comparable regulatory authorities of foreign countries must be obtained prior to commencement of manufacturing or marketing of the product in those countries. The requirements governing the conduct of clinical trials, product licensing, pricing, and reimbursement vary widely from country to country; however, foreign procedures are similar to those required by the FDA. Neoprobe intends, to the extent possible, to rely on foreign distributors of its products to manage and obtain regulatory approval for those products. Instrument Products. The nonclinical laboratory and clinical testing required by the FDA of medical devices is generally less extensive than that typically required for a biologic or drug. Nevertheless, these testing protocols may take up to several years to complete. There can be no assurance that the FDA will accept, act favorably or quickly in its review of the test data, once submitted, and significant difficulties or costs may be encountered by Neoprobe in its efforts to obtain FDA approvals that could delay or preclude Neoprobe from marketing its products for clinical purposes. Furthermore, there can be no assurance that the FDA will not request the development of additional data following the original submission, including clinical data. Based upon the information submitted to it, the FDA may also limit the scope of the product labeling, or the indications for which the product may be offered, or deny the marketing application altogether. Even after marketing approval is received, it may be revoked or modified for a variety of reasons. The FDA classifies medical devices into one of three classes -- class I, II, or III. This classification is based on the controls necessary to reasonably ensure the safety and effectiveness of the device. Class I devices are those whose safety and effectiveness can reasonably be ensured through general controls, such as labeling, premarket notification (the "510(k)" process), and adherence to FDA-mandated GMP requirements. Class II devices are those whose safety and effectiveness can reasonably be ensured through general and special controls, such as performance standards, postmarket surveillance, patient registries, and FDA guidelines. Class III devices are devices that must receive pre-market approval by the FDA to ensure their safety and effectiveness. They are generally life-sustaining, life-supporting, or implantable devices, and also include devices that are not substantially equivalent to a legally marketed class I or II product or to a class III device for which PMAs have not been called. If a manufacturer or distributor of medical devices can establish to the FDA's satisfaction that a new device is "substantially equivalent" to a legally marketed class I or class II medical device or to a class III device for which the FDA has not required pre-market approval, the manufacturer or distributor may market the device after clearance of a 510(k) notice. In the 510(k) submission, a manufacturer or distributor makes a claim of substantial equivalence, which the FDA may require to be supported by various types of information, including clinical data showing that the device is as safe and effective for its intended use as the legally marketed predicate device. Following submission of the 510(k), the manufacturer or distributor may not place the new device into commercial distribution until an order is issued by the FDA finding the new device to be substantially equivalent to a legally marketed predicate device. The FDA has no specific time limit by which it must approve a 510(k). The 510(k) process typically can take from six months up to 18 months or more. The FDA may agree with the manufacturer or distributor that the new device is substantially equivalent to another legally marketed device, and allow the new device to be marketed in the United States. The FDA may, however, determine that the new device is not substantially equivalent and require the Company to submit further information, such as additional clinical test data, before it is able to make a determination regarding substantial equivalence, which can substantially delay the market introduction of the product. For a device that is cleared through the 510(k) process, modifications or enhancements that could significantly affect the safety or effectiveness of the device or that constitute a major change to the intended use of the device will require a new 510(k) submission. -16- A pre-market approval application ("PMA") must be filed if a proposed device is not substantially equivalent to a legally marketed class I or class II device, or if it is a class III device for which the FDA has called for PMAs. The PMA process is much more expensive, uncertain and lengthy than the 510(k) process. A number of devices for which PMA approval has been sought by other companies has never been approved for marketing. A PMA application must be supported by valid scientific evidence which typically includes extensive testing and manufacturing information, including preclinical and clinical trial data, to demonstrate the safety and effectiveness of the device. FDA review and approval of a PMA usually takes at least 18 to 24 months and can take significantly longer, and typically includes review by an outside advisory panel of experts. Further, if a company wishes to propose modifications to the product subsequent to FDA clearance, including changes in indications or other significant modifications to labeling, or modifications to the manufacturing process, or if a company wishes to change its manufacturing facility, a new PMA application or supplement must be submitted to the FDA for review and approval. The Neoprobe 1000 instrument received 510(k) clearance in December 1986, and modified versions received 510(k) clearance in June 1992 and February 1995. The FDA has indicated that the Company must obtain PMA approval to market its laparoscopic probe, which currently is undergoing preclinical animal testing. The Company intends to seek permission from the FDA for a clinical trial to evaluate a laparoscopic version of the RIGS system. There can be no assurance that the FDA would grant permission for such a trial, or that the trial would proceed in a timely fashion, if at all. It is uncertain whether the FDA would require PMA approval or 510(k) clearance for the Company's other proposed RIGS instrument products. In addition, any PMA or 510(k) submission for a proposed instrument for use with a RIGS targeting agent may be required to be submitted to CBER or CDER as a combination product, as described above. The FDA also requires that Neoprobe's instrument products be manufactured in compliance with GMP regulations which govern the procedures, processes, controls, and documentation used in manufacturing Neoprobe's products. The FDA ensures GMP compliance through periodic facility inspections. Accordingly, manufacturers must commit ongoing substantial resources to maintaining a high level of compliance with GMP requirements. In addition, Neoprobe's promotional and educational activities regarding its diagnostic instrument products must comply with evolving FDA policies and regulations regarding acceptable device product promotion practices. There can be no assurance that Neoprobe will receive marketing clearance for any of its future products or that its clinical data or its manufacturing facilities will continue to satisfy FDA regulatory requirements. In addition, the manufacture, sale and use of Neoprobe's products are also subject to regulation by other federal entities, such as the Occupational Safety and Health Agency, the Nuclear Regulatory Commission and the Environmental Protection Agency, and by various state agencies. Federal and state regulations regarding the manufacture, sale, and use of Neoprobe's products are subject to future change, which changes could have a material adverse effect on Neoprobe's business, financial condition, and results of operations. RIGS/ACT. RIGS/ACT will be regulated by a new FDA division specifically established to review and approve cellular and gene therapies. This newly created division within the Center for Biologics Evaluation and Research will require IND, PLA, and ELA applications similar to biologics. However, since these are new therapies, the FDA has had limited experience and continues to develop guidance in this therapy product area. To date, all cellular and gene therapies are in the investigational stage. None of the therapies has yet reached the commercial clearance phase of FDA review. Accordingly, no precedents have been established. There can be no assurance that the FDA's lack of experience in this area will not cause additional delays or that Neoprobe will be successful in meeting all evolving regulatory requirements. The Company has completed Phase I/II feasibility studies of RIGS/ACT. Although the Company intends, based upon the results, to seek to begin a pivotal clinical trial of RIGS/ACT for a colorectal cancer indication, there can be no assurance that the FDA will grant permission for such a trial, that the trial will proceed in a timely fashion, if at all, or that the outcome will support the submission of a PLA. Manufacturing. In addition to obtaining FDA approval for each product, each manufacturing establishment for biological products must be inspected and approved by the FDA prior to approval of the PLA to market the product. Additionally, biologic product regulations currently require that the manufacturing facility file an ELA, demonstrat -17- ing GMP compliance prior to approval of the PLA for the product. Among the conditions for such approval is the requirement that the prospective manufacturer's quality control and manufacturing procedures conform to the FDA's GMP regulations, which must be followed at all times. In complying with standards set forth in these regulations, manufacturers must continue to expend time, money, and effort in the area of production and quality control to ensure full compliance. COMPETITION Neoprobe faces competition from biotechnology, pharmaceutical and chemical companies as well as from universities and other non-profit research organizations in the field of cancer diagnostics and treatment. Many emerging biotechnology companies have corporate partnership arrangements with large, established companies to support the research, development and commercialization of products that may be competitive with those of Neoprobe. In addition, a number of large established companies are developing proprietary technologies or have enhanced their capabilities by entering into arrangements with or acquiring companies with proprietary antibody technology or other technologies applicable to the detection or treatment of cancer. Many of Neoprobe's existing or potential competitors have substantially greater financial, research and development, regulatory, marketing and production resources than those of Neoprobe. In addition, certain of these companies have extensive experience in preclinical testing and human clinical trials. Other companies may develop and introduce products and processes competitive with or superior to those of Neoprobe. Further, the development by others of new cancer diagnostic or treatment methods not based on monoclonal antibodies, improvements in monoclonal antibody technology, or the development of a cure or vaccine for cancer could render Neoprobe's technology and products under development noncompetitive or obsolete. See "Risk Factors -- Competition" and "-- Risk of Technological Obsolescence." For Neoprobe's products, an important factor in competition may be the timing of market introduction of its products or those of its competitors products. Accordingly, the relative speed with which Neoprobe can develop products, complete the clinical trials and approval processes and supply commercial quantities of the products to the market will be an important competitive factor. Neoprobe believes that the RIGS system will offer a cancer diagnostic and treatment alternative or complementary method to currently available and reasonably foreseeable developing technologies in many cases. Neoprobe expects that competition among products approved for sale will be based, among other things, on product efficacy, safety, reliability, availability, price and patent position. Neoprobe believes that, given currently available technologies, the principal sources of competition likely to be faced by its proposed products will be preoperative diagnostic techniques such as CT, MRI and immunoscintigraphy. Both CT and MRI are widely available and used by a large number of physicians. However, neither of those technologies can distinguish malignant from non-malignant tissue. Several of Neoprobe's principal competitors are biotechnology-based companies that are developing products for immunoscintigraphy. The antibody products developed by these companies use high-energy gamma-emitting isotopes, as compared to the much lower energy gamma-emitting isotope used by Neoprobe. These companies have received approval or filed marketing applications for colorectal, ovarian, small cell lung, melanoma and breast cancer external imaging products. Although immunoscintigraphy can distinguish malignant from non-malignant tissue, none of the external imaging technologies is effective in consistently identifying tumors smaller than one centimeter or in precisely locating the site of a tumor. Such technologies only indicate that cancer may be present within a general area. Radiolabeled antibody products for use with immunoscintigraphy for recurrent colorectal cancer patients have already been approved by regulatory authorities in Europe and the United States. While Neoprobe views immunoscintigraphy to be complementary to the RIGS technology because immunoscintigraphy involves a preoperative diagnostic procedure, some physicians may choose to use the preoperative information provided by immunoscintigraphy in lieu of obtaining the information provided by the intraoperative RIGS technology. If a significant number of physicians choose to use immunoscintigraphy or another diagnostic procedure in lieu of the RIGS technology, Neoprobe's ability to generate commercial revenues, if any, could be adversely affected. The Company is aware of companies that have initiated development of photodynamic diagnostic products. This technology uses agents that target cancer and also carry fluorescing molecules that can be activated by laser or other light sources. Light from the fluorescing molecules can then be detected with the proper instrumentation. -18- Neoprobe believes these products are at a very early stage of development and that they are applicable primarily to detecting tumor which resides on the surface of tissue. The Company believes that ultrasound imaging technology is the only other intraoperative technology, which may be capable of detecting tumors during surgery The ultrasound imaging technology is currently approved for use in the United States and is used by surgeons for the detection of tumors, but is limited to almost exclusively detecting tumors in the liver. EMPLOYEES As of March 18, 1997, Neoprobe, including MonoCarb and Neoprobe (Israel), had 92 full-time and nine part-time employees. Fifteen employees hold Ph.D. degrees and five hold M.D. degrees. Neoprobe considers its relations with its employees to be satisfactory. RISK FACTORS The discussion in this Report contains forward-looking statements that involve risks and uncertainties. The Company's actual results may differ significantly from the prospects discussed in the forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in "Item 6. Management's Discussion and Analysis of Financial Condition and Results of Operations." Early Stage of Development; No Commercialized Products The Company is still in the development stage and has not received approval to market any of its products for the detection of cancer, except in the Republic of Korea,. However, the Company has received clearance to market the Neoprobe 1000 instrument for use as a radioisotope detector only for use with approved radiopharmaceuticals, none of which currently are Neoprobe's products. To date, the Company has completed a Phase III clinical trial with the Company's lead product, RIGScan CR49, for the surgical detection of metastatic and recurrent colorectal cancer in both the United States and Europe. The Company filed marketing applications for this product with regulatory agencies in Europe in May 1996 and with the FDA in December 1996. Enrollment of patients in a separate Phase III clinical study for primary colorectal cancer has been completed in the United States and in Europe. Substantial clinical and statistical analysis of the data collected from the clinical trials of this product and substantial clinical trials of the Company's other products must be completed before submissions can be made to appropriate regulatory authorities. Such analysis and trials require substantial financial and management resources and could require more time than is currently estimated. There can be no assurance that the Company will be able to conclude successfully the clinical tests or development of any of its proposed products within the Company's expected time frame and budget, if at all, or that the Company's products will prove to be safe and effective in clinical trials. There also can be no assurance that the Company will be able to obtain governmental approval for the commercial marketing and sale of any of its proposed products. If the Company is unable to conclude successfully the clinical tests or if the RIGS system does not prove to be safe and effective, or if the Company does not obtain governmental approval or is otherwise unable to commercialize the RIGS system successfully, the Company's business, financial condition and results of operations will be materially adversely affected and could result in the cessation of the Company's business. See"--Clinical Research." Limited Revenues; Continuing Net Losses; Accumulated Deficit The Company's limited history of operations, the nature of its business, and the governmental approval process make the prediction of future operating results difficult and highly unreliable. The Company's business, therefore, must be evaluated in light of the risks, expenses, delays and complications normally encountered by development-stage companies in the highly competitive, highly regulated biomedical industry, which is characterized by a high rate of failure. Since its inception in 1983, the Company has been primarily engaged in research and development of the RIGS technology. The Company has experienced significant operating losses in each year since inception, and had an accumulated deficit of approximately $64.1 million as of December 31, 1996. For the years ended December 31, 1994, 1995 and 1996, the Company's net losses were $10.6 million, $10.8 million, and $21 million, respec- -19- tively. The Company expects operating losses to continue as research and development and clinical trial efforts continue, and as the Company awaits for the regulatory authorities to complete their review of the Company's first marketing license application. The Company's ability to achieve profitable operations is dependent upon obtaining regulatory approval of its products and making the transition to a revenue generating company. There can be no assurance that the Company will ever achieve a profitable level of operations. See "Management's Discussion and Analysis of Financial Condition and Results of Operations." Dependence upon Principal Product Line; Uncertainty of Market Acceptance The Company's future success is dependent upon obtaining regulatory approvals to market, and achieving market acceptance of, the Company's proposed RIGS products, which represent the Company's principal proposed product line. There can be no assurance that the Company will receive approval to market any of its RIGS products from the appropriate regulatory authorities. Moreover, achieving market acceptance for the RIGS products, if approved, will require significant efforts and expenditures to create awareness and demand for the RIGS products by surgeons, nuclear medicine departments of hospitals, oncologists and, possibly, cancer patients. Widespread use of the Company's RIGS products would require the training of numerous physicians, and the time required to complete such training could result in a delay or dampening of market acceptance. There can be no assurance that the Company's initial proposed commercial products, RIGS products for colorectal cancer, or any other proposed products will become standard surgical procedure or even generally accepted medical practice, or that the Company will achieve any market penetration. In addition, purchase decisions are greatly influenced by health care administrators who are subject to increasing pressures to reduce costs. Healthcare administrators must determine that the Company's products are cost-effective alternatives to current means of tumor detection. The failure to obtain governmental approvals or achieve significant market acceptance for such products would have a materially adverse effect on the Company's business, financial condition and results of operations. See "-- Marketing and Distribution ." Government Regulation The Company's biologic products will require a regulatory license to market by the FDA and by comparable agencies in foreign countries. In addition, various federal, state and foreign statutes also govern or influence the manufacture, safety, labeling, storage, record keeping and marketing of such products. The process of obtaining regulatory licenses and approvals is costly, time consuming, and prone to unexpected delay. The Company has encountered and may continue to encounter delays in the completion of testing for certain proposed products. Future delays could result from, among other things, a longer than expected review process and possible additional analysis and reconciliation of any perceived differences between data generated in Phase I/II and Phase II clinical trials and data generated in Phase III clinical trials, slower than expected patient enrollment rates, difficulties in analyzing data from clinical trials or in validating manufacturing processes and changes in regulatory requirements. In addition, although certain members of management and significant employees and consultants have had substantial experience in conducting and supervising clinical trials for pharmaceutical and biomedical products, the Company has not previously submitted a BLA to the FDA or a dossier to European regulatory agencies for approval of a license to market its products. There can be no assurance that clinical data collected in the Company's pivotal Phase III trials will be sufficient to support approval of licenses for the Company's products or that the FDA or European regulatory agencies will not require additional information and data, including additional clinical studies, or refuse to file the application for substantive review. Failure to obtain these licenses and to commence commercial marketing on a timely basis could jeopardize the Company's rights under certain of its current or contemplated contractual arrangements for the supply of necessary components of its RIGS system products and would have a material adverse effect on the Company's business, financial condition and results of operations. Moreover, foreign and domestic approvals, if granted, may include significant limitations on uses of the products. Further, even if such regulatory approval is obtained, use of the Company's products could reveal side effects that, if serious, could result in suspension of existing licenses and delays in obtaining licenses in other jurisdictions. A marketed product, manufacturer and manufacturing facilities are subject to continual review and periodic inspections, and later discovery of previously unknown problems with a product, manufacturer or facility may result in restrictions on such product or manufacturer, including withdrawal of the prod- -20- uct from the market. Noncompliance with applicable governmental requirements can result in import detentions, fines, civil penalties, injunctions, suspensions or loss of regulatory approvals, recall or seizure of the Company's products, operating restrictions, government refusal to approve product export applications or to allow the Company to enter into supply contracts, and criminal prosecution. Additional governmental regulation may be established which could prevent or delay regulatory approval of the Company's products. Any delays or failure to receive required approvals or limiting conditions on approvals could materially adversely affect the Company's business, operating results and financial condition. See "-- Government Regulation." In addition to regulations enforced by the FDA, the manufacture, distribution and use of Neoprobe's products are also subject to regulation by the Nuclear Regulatory Commission, the Department of Transportation and other federal, state and local government authorities. Neoprobe and/or its manufacturer of the radiolabeled antibodies must obtain a specific license from the Nuclear Regulatory Commission to manufacture and distribute radiolabeled antibodies as well as comply with all applicable regulations. Neoprobe must also comply with Department of Transportation regulations on the labeling and packaging requirements for shipment of radiolabeled antibodies to licensed clinics, and must comply with federal, state and local governmental laws regarding the disposal of radioactive waste. There can be no assurance that the Company will be able to obtain all necessary licenses and permits and be able to comply with all applicable laws. The failure to obtain such licenses and permits or to comply with applicable laws would have a materially adverse effect on the Company's business, financial condition and results of operations. No Assurance of Continued Rights to Targeting Agents; Royalty Payments Targeting agents, such as monoclonal antibodies or peptides which are able to bind specifically to tumor antigens or receptors, are essential to the Company's technology and the Company's ultimate success. The targeting agents used by the Company in its research and clinical studies and as components of its proposed RIGS products are the patented or proprietary technology of others. The Company must purchase the rights to those targeting agents or must obtain rights to use them through license agreements with their owners. There can be no assurance that such arrangements will continue or that they will continue on terms acceptable to the Company. Furthermore, license agreements typically impose obligations to diligently develop commercial products and to pay royalties on those products. Failure to perform such obligations may lead to the termination of such license agreements. Loss of the Company's rights to targeting agents for any reason (including, in the case where the Company is a sublicensee of the targeting agents, a breach by a sublicensor under its agreement with the owner of a targeting agent) or the inability to obtain necessary rights on acceptable terms could have a material adverse effect on the Company's business, financial condition and results of operations. Moreover, there can be no assurance that improved targeting agents will not be developed by other entities for which the Company will be required to seek satisfactory additional license arrangements. If such licenses cannot be readily obtained, the Company could encounter delays in product market introductions or could find that the development, manufacture or sale of products requiring such licenses could be foreclosed, which could have a material adverse impact on the Company's business, operating results and financial condition. Upon commercialization of the Company's products, the Company will be required to make royalty payments pursuant to its existing and contemplated license agreements which could adversely impact the Company's operating results. See "-- License and Technology Agreements." Patents, Proprietary Technology and Trade Secrets The Company's success depends, in part, on its ability to secure patent protection and maintain trade secret protection, and on its ability to operate without infringing on the patents of third parties. The Company has received 10 United States patents, including U.S. Patent No. 4,782,840, which relates to the RIGS system surgical method and holds one additional patent jointly with OSURF. The Company has filed applications for certain additional United States and foreign patents. There can be no assurance, however, that the patents for which the Company has applied will be issued to the Company. Moreover, the Company believes that some of the technology it develops will not be patentable in certain foreign markets. There can be no assurance that any of the Company's patents or patent applications will not be challenged, invalidated, or circumvented in the future. In addition, there can be no assurance that competitors, many of which have substantially more resources than the Company and have made substantial investments in competing technologies, will not seek to apply for and obtain patents that will prevent, limit, or interfere with the Company's ability to make, use, or sell its products either in the United States or internationally. Furthermore, the patent positions of biotechnology firms, including the Company, are highly uncertain and -21- involve complex legal and factual questions. To date, a consistent and predictable application of United States patent laws regarding the grant and interpretation of patent claims in the area of biotechnology has not evolved. Due to these uncertainties, the probability of challenges, invalidations, and circumventions is higher than in technologically and legally stable fields. Patent applications in the United States are maintained in secrecy until patents issue, and patent applications in foreign countries are maintained in secrecy for a period after filing. Publications of discoveries in the scientific or patent literature tend to lag behind actual discoveries and the filing of related patent applications. Patents issued and patent applications filed relating to medical devices are numerous and there can be no assurance that current and potential competitors and other third parties have not filed or will not file in the future applications for, or have not received or in the future will not receive, patents or obtain additional proprietary rights relating to products or processes used or proposed to be used by the Company. The Company's U.S. Patent No. 4,782,840 includes claims to surgical procedures having a number of steps, including, for example, the step of administering an effective amount of an antibody specific for cancer tissue, labeled with a radioactive isotope. The claims also include the step of delaying surgery for a time interval following the administration step to permit the radiolabeled antibody to concentrate preferentially in any cancer tissue that is present and for the unbound radiolabeled antibody in the blood pool to be cleared to a blood pool background level, so as to increase the ratio of radiation from cancer tissue to background radiation. There can be no assurance that potential competitors will not promote surgical procedures that do not include one or more of the steps recited in the claims of U.S. Patent No. 4,782,840, including the aforementioned steps. The Company also relies upon trade secrets, technical know-how, and continuing technological innovation to develop and maintain its competitive position. The Company typically requires its employees, consultants, and advisors to execute confidentiality and assignment of inventions agreements in connection with their employment, consulting, or advisory relationships with the Company. There can be no assurance, however, that these agreements will not be breached or that the Company will have adequate remedies for any breach. Further, there also can be no assurance that others will not gain access to the Company's trade secret information or independently develop or acquire the same or equivalent trade secret information. Certain of the research activities relating to the development of antibody technology that may be components of the Company's proposed RIGS system technology products were conducted by agencies of the United States government. When the United States government participates in research activities, it retains certain rights that include the right to use the technologies for governmental purposes under a royalty-free license, as well as rights to use and disclose technical data and computer software that could preclude the Company from asserting trade secret rights in that data and software. The Company has not been notified by any third party that the Company's products and procedures infringe any valid, enforceable claim of any patent owned by others. Any such claim, however, whether with or without merit, could be time-consuming and expensive to respond to and could divert the Company's technical and management personnel. The Company may become involved in litigation to defend against claims of infringement made by others, to enforce patents issued to the Company, or to protect trade secrets of the Company. If any relevant claims of third-party patents are upheld as valid and enforceable in any litigation or administrative proceeding against the Company, it could be prevented from practicing the subject matter claimed in such patents, or would be required to obtain licenses from such patent owners, or to redesign its products and processes to avoid infringement. There can be no assurance that the Company will be able to obtain acceptable licenses or rights, if at all, to other patents which the Company deems necessary for its operations. Accordingly, an adverse determination in a judicial or administrative proceeding or failure to obtain necessary licenses could prevent the Company from manufacturing and selling its products, which would have a material adverse effect on the Company's business, financial condition, and results of operations. The Company intends to vigorously protect and defend its intellectual property. Costly and time-consuming litigation brought by the Company may be necessary to enforce patents issued to the Company, to protect trade secrets or know-how owned by the Company, or to determine the enforceability, scope, and validity of the proprietary rights of others. See "-- Patents and Proprietary Rights" and "-- Competition." -22- Limited Third Party Reimbursement The Company's products will be marketed to hospitals and other users that bill various third party payers, including government programs, such as federal Medicare and state Medicaid, and private insurance plans, for the health care services provided to their patients. Third party payers carefully review and are increasingly challenging the prices charged for medical products and services. Although the Company intends to establish the prices for its products according to criteria believed to be acceptable to third party payers, there can be no assurance that such payers will not deny reimbursement on the basis that the Company's products are not in accordance with established payer policies regarding cost effective treatment methods, or on some other basis. There can be no assurance that the Company would be able to provide economic and medical data to overcome any third party payer objections. In foreign markets, reimbursement is obtained from a variety of sources, including governmental authorities, private health insurance plans, and labor unions. In most foreign countries, there are also private insurance systems that may offer payments for alternative therapies. Although not as prevalent as in the United States, health maintenance organizations are emerging in certain European countries. The Company may need to seek international reimbursement approvals, although there can be no assurance that any such approvals will be obtained in a timely manner or at all. Failure to receive international reimbursement approvals could have an adverse effect on market acceptance of the Company's products in the international markets in which such approvals are sought. There can be no assurance, as to either United States or foreign markets, that third party reimbursement and coverage or newly approved products will be available or adequate, that current reimbursement policies of third party payers will not be decreased in the future or that future legislation, regulation, or reimbursement policies of third party payers will not otherwise adversely affect the demand for the Company's products or its ability to sell its products on a profitable basis. If third party payer coverage or reimbursement is unavailable or inadequate, the Company's business, financial condition, and results of operations could be materially adversely affected. See "-- Marketing and Distribution." Competition The biotechnology industry is characterized by intense competition. Many companies, research institutes and universities are working in a number of pharmaceutical or biotechnology disciplines similar to the Company's field of interest. In addition, many companies are engaged in the development of or currently offer products which may be or are competitive with the Company's proposed products. Most of these entities have substantially greater financial, technical, manufacturing, marketing, distribution or other resources than the Company. Competing tumor detection technologies include CT, MRI and, more recently, immunoscintigraphy. The Company may compete against a number of these companies including: Cytogen Corp., Immunomedics Inc. and NeoRx Corp. One or more of these or other companies could also design and develop products that compete directly with the Company's products, in which case the Company would face intense competition. Such competition could have a material, adverse effect on the Company's business, financial condition and results of operations. The Company is aware that other research and testing is being conducted in Western Europe in connection with the use of radiolabeled targeting agents and radiation-detection probes. There can be no assurance that one or more of these or other companies will not develop technologies that are more effective or less costly than the Company's products, or that would otherwise render the Company's products and technology non-competitive or obsolete. Such technologies would have a material adverse effect on the Company's business, financial condition and results of operations. Any product developed by the Company that gains regulatory approval will have to compete for market acceptance and market share. An important factor in such competition may be the timing of market introduction of competitive products. Accordingly, the relative speed with which the Company can develop products, complete clinical testing and regulatory approval processes, gain reimbursement acceptance and supply commercial quantities of the product to the market is expected to be an important competitive factor. In addition, the Company believes that the primary competitive factors in the market for tumor detection products are safety, efficacy, ease of delivery, reliability, innovation and price. The Company also believes that physician relationships and customer support are important competitive factors. There can be no assurance that the Company can achieve or maintain a competitive position or that the Company's intraoperative detection products for the treatment of cancer will be introduced or marketed in a timely -23- fashion or that any such products will achieve significant market acceptance. In such event, the Company's business, operating results and financial condition could be materially adversely affected. See "-- Competition." Risk of Technological Obsolescence The medical device industry is characterized by rapid and significant technological change. There can be no assurance that third parties will not succeed in developing or marketing technologies and products that are more effective than those developed or marketed by the Company or that would render the Company's technology and products obsolete or noncompetitive. Additionally, new surgical procedures and medications could be developed that replace or reduce the importance of current procedures that use the Company's products. Accordingly, the Company's success will depend in part on its ability to respond quickly to medical and technological changes through the development and introduction of new products. Product development involves a high degree of risk and there can be no assurance that the Company's new product development efforts will result in any commercially successful products. In such event, the Company's business, operating results and financial condition could be materially adversely affected. See "-- Competition." Limited Manufacturing Capacity and Experience To date, the Company's manufacturing activities have consisted primarily of manufacturing limited quantities of products for use in clinical trials. In order to achieve financially self sustaining operations, the Company must manufacture its RIGS products, including targeting agents, in commercial quantities at an acceptable cost. If the Company scales up manufacturing its products, there can be no assurance that the Company will not encounter difficulties such as problems involving product yields, quality control and assurance, supplies of components, and shortages of qualified personnel. Moreover, in order to assemble, complete, package and distribute its RIGS products in commercial quantities, the Company will have to maintain a current GMP facility to manufacture its products or engage independent contractors to manufacture such products. The GMP facility will have to adhere to GMP regulations and to guidelines enforced by the FDA and other regulatory agencies through their facilities inspection programs. If such an inspection by the FDA or another regulatory agency results in a requirement for additional modifications to the facility, the Company's ability to manufacture its products could be adversely affected. There can be no assurance that the Company will be able to engage independent contractors or develop and maintain a GMP facility at a cost acceptable to the Company. See "-- Manufacturing." The Company uses or relies on certain components and services used in its devices that are provided by sole source suppliers. Although the Company has identified primary and alternative vendors, the qualification of additional or replacement vendors for certain components or services is a lengthy process. Any significant supply interruption would have a material adverse effect on the Company's ability to manufacture its products and, therefore, a material adverse effect on its business, financial condition, and results of operations. The Company expects to manufacture its products based on forecasted product orders. Lead times for materials and components ordered by the Company vary significantly, and depend on factors such as the business practices of the specific supplier, contract terms, and general demand for a component at a given time. Certain components used in the Company's products have long lead times. As a result, there is a risk of excess or inadequate inventory if orders do not match forecasts. Possible Volatility of Stock Price The market price of the shares of Common Stock of the Company, like that of the securities of many other biotechnology companies, has been and is likely to continue to be highly volatile. For example, the closing price for shares of the Company's Common Stock for the last two years has been as high as $22 and as low as $1.50. Factors such as the results of preclinical and clinical trials by the Company or its competitors, other evidence of the safety and efficacy of the Company's or competitors' products, announcements of technological innovations or new commercial products by the Company or its competitors, changes in securities analysts' estimates or recommendations, governmental regulation, developments in patent or other proprietary rights of the Company or its competitors, and fluctuations in the Company's operating results may have a significant effect on the market price of the Common -24- Stock. In addition, the stock market has experienced and continues to experience extreme price and volume fluctuations which have affected the market price of many biotechnology companies and which have often been unrelated to the operating performance of these companies. These broad market fluctuations, as well as general economic and political conditions, may adversely affect the market price of the Common Stock. The Company has more than 22.5 million shares of Common Stock outstanding, almost all of which are freely tradable. See "Item 5. Market for Common Equity and Related Stockholders Matters." Future Capital Needs; Uncertainty of Capital Funding To date, the Company's capital requirements have been significant. The Company has depended on the proceeds of sales of its securities and other financing vehicles to continue clinical testing of its proposed products and to fund its working capital requirements. The Company believes that the funds it has on hand will satisfy its cash needs through the end of 1998. Obtaining approvals to market is costly and time consuming and the Company may require significant funds in addition to its current cash resources to sustain its operations and to obtain regulatory approval to commercialize any of its proposed products. No assurance can be given that the necessary additional financing will be available to the Company on acceptable terms, if at all, or that would not result in further dilution to the holders of the Company's equity securities. The Company's ability to raise additional financing may be dependent on many factors beyond the Company's control, including the state of capital markets, the development or prospects for development of competitive technology by others, and the rate of progress of the Company's clinical trials. If additional funding is unavailable to the Company when needed, the Company will be required to curtail significantly one or more of its research and development programs and the Company's business and financial condition will be materially adversely affected. See "Item 6. Management's Discussion and Analysis of Financial Condition and Results of Operations -- Liquidity and Capital Resources." Product Liability The testing, marketing and sale of the Company's proposed products could expose the Company to liability claims. The Company currently has $10 million of liability insurance, which the Company believes is adequate for its current activities There can be no assurance, however, that the Company will be able to continue to obtain such additional insurance at a reasonable cost, if at all, or that such insurance would be sufficient to cover any liabilities resulting from any product liability claims or that the Company will have funds available to pay any claims over the limits of its insurance. Either an underinsured or an uninsured claim could have a material adverse effect on the Company's business, operating results and financial condition. Dependence on Key Personnel; Ability to Attract New Personnel; Possible Conflicts of Interest John L. Ridihalgh and David C. Bupp are key employees of the Company and the loss of the services of either one of them could substantially delay the achievement of the Company's goals. The Company carries "key man" life insurance with a death benefit of $1.0 million on each of them. The Company has entered into employment agreements with each of these individuals pursuant to which, among other things, these individuals have agreed not to compete with the Company for specified periods. The Company's success is dependent on its ability to attract and retain additional technical and management personnel with expertise in several technical and scientific disciplines and experience in the regulatory approval process. The competition for qualified personnel in the biomedical industry is intense and, accordingly, there can be no assurance that the Company will be successful in hiring or retaining the requisite personnel. In addition, the Company will rely on certain of its non-employee directors and members of its Scientific Advisory Board to assist the Company in formulating and pursuing its research and commercialization strategy. These directors and members of the Scientific Advisory Board are and will be employed by entities other than the Company and may serve as directors of or have a commitment to or consulting or advisory contracts with other entities, including potential competitors of the Company. Although the Company has confidentiality agreements with these directors and with each member of its Scientific Advisory Board, conflicts of interest may arise between those persons and the Company, which conflicts may not necessarily be resolved in favor of the Company. See "Item 9. Directors, Executive Officers, Promoters and Control Persons; Compliance with Section 16(a) of the Exchange Act." -25- Need to Manage a Changing Business In order to compete effectively against current and future competitors, complete clinical trials in progress, prepare additional products for clinical trials, and develop future products, the Company believes that it must continue to expand its operations, particularly in the areas of research and development, manufacturing and marketing. If the Company were to experience significant growth in the future, such growth would likely result in new and increased responsibilities for management personnel and place significant strain upon the Company's management, operating and financial systems and resources. To accommodate such growth and compete effectively, the Company must continue to implement and improve information systems, procedures and controls, and to expand, train, motivate, and manage its work force. The Company's future success will depend to a significant extent on the ability of its current and future management personnel to operate effectively. There can be no assurance that the Company's personnel, systems, procedures and controls will be adequate to support the Company's future operations. Any failure to implement and improve the Company's operational, financial, and management systems or to expand, train, motivate or manage employees could have a material adverse effect on the Company's business, financial condition and results of operations. See "-- Dependence on Key Personnel; Ability to Attract New Personnel; Possible Conflicts of Interest" and "Item 9. Directors, Executive Officers, Promoters and Control Persons; Compliance with Section 16(a) of the Exchange Act." No Dividends The Company has never paid dividends on its Common Stock. The Company intends to retain any future earnings to finance its growth. Accordingly, any potential investor who anticipates the need for current dividends from its investment should not purchase any of the Common Stock offered hereby. See "Item 5. Market for Common Equity and Related Stockholders Matters." Anti-Takeover Provisions; Blank Check Preferred Stock The Company has adopted a stockholder rights plan. Certain provisions of the stockholder rights plan and certain of the Company's charter provisions and applicable corporate laws could be used to hinder or delay a takeover bid for the Company. Such provisions may inhibit takeover bids and decrease the chance of stockholders realizing a premium over market price for their Common Stock as a result of a takeover. The Company's Certificate of Incorporation authorizes the issuance of "blank check" preferred stock with such designations, rights, preferences and restrictions as may be determined from time to time by the Board of Directors, 500,000 shares of which have been designated as Series A Junior Participating Preferred Stock and reserved for issuance pursuant to the Company's stockholder rights plan. If the Company issues Preferred Stock, the issuance could be used to thwart a takeover bid and may have a dilutive effect upon the Company's common stockholders, including the purchasers of the securities offered hereby. ITEM 2. DESCRIPTION OF PROPERTY. In February 1994, Neoprobe moved to its current office at 425 Metro Place North, 4th Floor, in Dublin, Ohio. In November 1996, the Company executed a lease agreement with the landlord of these facilities for approximately 31,400 square feet. The lease agreement begins on January 1, 1997 and ends in May 2003. The lease provides for a base rent of approximately $20,750 in the first year of the lease and increases to $26,350 in the last year of the lease. The Company must also pay a portion of the building operating and real estate taxes of the building. Neoprobe believes these facilities are in good condition and will be adequate for its needs for the foreseeable future. Neoprobe's wholly-owned subsidiary, MonoCarb, currently leases office and production facilities in Lund, Sweden, which occupy approximately 16,500 square feet. The lease is for a term of approximately five years commencing July 1, 1996 and provides for a base rent of approximately $32,000 per month (subject to annual increases based on the Swedish consumer price index). The lease is automatically extended for an additional period of five years each unless notice of termination is given 18 months before the end of the lease. Neoprobe believes these facilities are in good condition and will be adequate for its needs for the foreseeable future. -26- ITEM 3. LEGAL PROCEEDINGS. In June 1996 a lawsuit against the Registrant was terminated by dismissal. The Registrant was named as an additional party defendant in the In Re Blech Securities litigation pending in the United States District Court for the Southern District of New York before Judge Robert Sweet in March 1995. The plaintiffs were eight named individuals who were alleged to be representatives of a class of securities purchasers. The defendants included David Blech, who was a principal stockholder of the Registrant until September 1994, Mark Germain, who was a director of the Registrant until September 1994, D. Blech & Co., a registered broker-dealer owned by Mr. Blech, trustees of certain trusts established by Mr. Blech, Bear Stearns & Co., Baird Patrick & Co., Parag Saxena and Chancellor Capital Corp., as well as the Registrant and 10 other corporations of which Mr. Blech was a principal stockholder (the "Corporate Defendants"). The complaint alleged that David Blech and D. Blech & Co. conducted a scheme intended to artificially inflate the prices of securities issued by corporations Mr. Blech controlled; that Mr. Blech, D. Blech & Co. and corporations controlled by Mr. Blech gave or sold cheap stock to fund managers in order to induce them to participate in this scheme; and that David Blech, his trusts, D. Blech & Co., Baird Patrick, Bear Stearns, the Corporate Defendants and unnamed other persons engaged in sham transactions, including "round trip" sales, for the purpose of artificially inflating trading volumes and securities of corporations controlled by Mr. Blech and maintaining their trading prices. The complaint alleged that David Blech was the controlling person and Mark Germain was a director of the Corporate Defendants and that the knowledge and participation of Messrs. Blech and Germain in the alleged scheme were the responsibility of the Corporate Defendants. The complaint also alleged that the Corporate Defendants actively engaged in the alleged scheme and benefited from it. The complaint further alleged that all of the defendants engaged in a conspiracy to manipulate the market and failed to disclose truthful information about the true value of securities issued by corporations controlled by Mr. Blech. The complaint alleged violations of Securities and Exchange Commission Rule 10b-5 and common law fraud by all defendants, violations of the Racketeer Influenced Corrupt Organizations Act (RICO) by defendants other than the Corporate Defendants and liability under Securities Exchange Act 20(a), as the liability of controlling persons, by Messrs. Blech and Germain and D. Blech & Co., Baird Patrick and Bear Stearns. The amount of damages requested was not specified in the complaint. In June 1996, Judge Sweet dismissed the allegations against the Registrant and the other Corporate Defendants because the plaintiffs had failed to identify the alleged fraudulent acts of the Registrant and the other Corporate Defendants with the specificity required by federal law. The dismissal terminated the action against the Registrant without any findings of liability against Registrant in July 1996. The Judge's order can still be appealed, and the time for appeal will not begin to run until a final judgment has been entered in the entire multi-party proceeding . ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS. None. -27- PART II ITEM 5. MARKET FOR COMMON EQUITY AND RELATED STOCKHOLDER MATTERS. The Common Stock, of the Company trades on The Nasdaq National Market under the trading symbol "NEOP". The prices set forth below reflect the high and low sale prices for shares of Common Stock during the last two fiscal years as reported by The Nasdaq National Market.