| IMMUNICON CORP      Item 1A    Risk factors          The following is a discussion of certain significant risk factors that could     potentially negatively impact our financial condition, performance and     prospects | 
    
      | In addition to other information contained in this report, you     should carefully consider the following factors in evaluating our company | 
    
      | Any of the following factors could materially and adversely affect our     business, financial position and results of operations | 
    
      | RISKS RELATING TO OUR BUSINESS          We  have  a  history  of operating losses, expect to continue to incur     substantial losses, and might never achieve or maintain profitability | 
    
      | We have incurred significant net losses     since  we began operations in 1983 | 
    
      | As of December 31, 2005, we had an     accumulated deficit dlra118dtta4 million | 
    
      | For the three years ended December 31,     2005, 2004 and 2003 we had net losses of dlra26dtta9 million, dlra27dtta9 million and     dlra17dtta6 million, respectively | 
    
      | These losses have resulted primarily from costs     incurred in our research and development programs and from our general and     administrative expenses | 
    
      | Because our operating expenses may increase in the     near  term, we will need to generate significant additional revenue to     achieve profitability | 
    
      | As we do not as yet have sufficient operating revenue     from the sales of our products to offset our losses, we do not expect to     have any sufficient operating income from the sale of our products until at     least 2008 | 
    
      | We will continue to incur research and development and clinical     trial expenses, as well as increased manufacturing, sales and marketing     expenses | 
    
      | These losses, among other things, have had and will continue to     have  an  adverse  effect  on  our  working  capital, total assets and     stockholders’  equity | 
    
      | Because of the numerous risks and uncertainties     associated with our product development efforts,       _________________________________________________________________         34      ______________________________________________________________________       Part I      _________________________________________________________________         market acceptance and uncertainties concerning the success of sales efforts     by us and Veridex, we are unable to predict when we will become profitable,     and we may never become profitable | 
    
      | Even if we do achieve profitability, we     may not be able to sustain or increase profitability on a quarterly or     annual basis | 
    
      | If we are unable to achieve and then maintain profitability,     the market value of our common stock will decline | 
    
      | If  our  relationship  with Veridex is terminated or does not function     effectively, we may be unable to continue to commercialize effectively     certain of our products based on our technologies in the field of cancer | 
    
      | We entered into a development, license and supply agreement with Veridex,     under which we granted to Veridex a worldwide exclusive license in the field     of cancer to commercialize cell analysis products based on our technologies | 
    
      | We also appointed Veridex as our exclusive sales, invoicing and collection     agent for our cell analysis instrumentation in cancer | 
    
      | Veridex may terminate     this agreement with or without reason at any time by providing us with     24 months’ prior written notice | 
    
      | Veridex also may terminate this agreement     if we are in material breach or are acquired by a competitor in the IVD     field | 
    
      | In addition, while we have granted Veridex the exclusive right to     market,  distribute and conduct field, technical, customer service and     certain manufacturing finishing operations for these products, Veridex has     very limited obligations to perform these functions under this agreement | 
    
      | For example, the agreement does not require Veridex to meet any minimum     levels  with  respect to sales, marketing personnel or other marketing     expenditures | 
    
      | If Veridex were to terminate, or fail to meet its obligations     under this agreement or fail to deploy adequate resources to commercialize     products under this agreement:         Ø   we would incur significant delays and expense in the commercialization     of these products;         Ø   we might be unable to enter into a similar agreement with another     company with similar resources to commercialize these products and perform     these functions on acceptable terms, if at all; and         Ø   we might be unable to commercialize these products or perform these     functions successfully ourselves | 
    
      | Any of these outcomes could result in delays in our ability to generate     revenues from the sales of these products, an increase in our expenses and a     resulting adverse impact on our operations and financial results, and the     value of our common stock would likely decline | 
    
      | If we and Veridex are able to generate product sales under our agreement, we     are required to invest an amount ranging from between 8dtta5prca and 10prca of total     net product sales by Veridex, excluding revenue from cell analysis system     sales,  in  research  and development for cancer-related cell analysis     products | 
    
      | If our products and Veridex’s products do not achieve market acceptance, we     will be unable to generate significant revenues from them | 
    
      | The future commercial success of our products and of Veridex’s products     based on our technologies will depend primarily on:         Ø   convincing research, reference and clinical laboratories to conduct     validation studies using these products and to offer these products as     research tools for scientists and clinical investigators and as diagnostic     products to physicians, laboratory professionals and other medical     practitioners; and         Ø   convincing physicians to order tests for their patients, and laboratory     professionals and other medical practitioners to use our technologies | 
    
      | To  accomplish this, we and Veridex will need to convince oncologists,     primary  care physicians, surgeons, laboratory professionals and other     members of the medical and biotechnology communities of the benefits of     these  products  through published papers, presentations at scientific     conferences and       _________________________________________________________________                                                                            35      ______________________________________________________________________       Part I      _________________________________________________________________         additional clinical trials | 
    
      | If we and Veridex are not successful in these     efforts,  the  market  acceptance for these products could be limited | 
    
      | Additionally, if ongoing or future clinical trials result in unfavorable or     inconsistent results, these products may not achieve market acceptance | 
    
      | Other factors that might influence market acceptance of these products     include the following:         Ø   evidence of clinical utility;         Ø   ability to obtain sufficient third-party coverage or reimbursement;         Ø   convenience and ease of administration;         Ø   availability of alternative and competing diagnostic products;         Ø   cost-effectiveness;         Ø   effectiveness of marketing, distribution and pricing strategy; and         Ø   publicity concerning these products or competitive products | 
    
      | If these products do not gain broad market acceptance, our business will     suffer | 
    
      | If we or Veridex are not able to obtain all of the regulatory approvals and     clearances required to commercialize our products, our business would be     significantly harmed | 
    
      | The products based on our technologies are generally regulated as medical     devices  by  the  FDA  and  comparable agencies of other countries | 
    
      | In     particular, FDA regulations govern, among other things, the activities that     we and Veridex perform, including product development, product testing,     product labeling, product storage, pre-market notification clearance (or     510(k)  clearance)  or  pre-market  approval  (or PMA), manufacturing,     advertising, promotion, product sales, reporting of certain product failures     and distribution | 
    
      | Most of the products that we plan to develop and commercialize in the US     will require either 510(k) clearance, or PMA approval from the FDA prior to     marketing | 
    
      | The 510(k) clearance process usually takes from two to twelve     months from submission, but can take longer | 
    
      | The PMA process is much more     costly, lengthy and uncertain and generally takes from one to two years or     longer from submission | 
    
      | All of the products that we or Veridex intend to submit for FDA clearance or     approval will be subject to substantial restrictions, including, among other     things, restrictions on the indications for which we and Veridex may market     these products, which could result in lower revenues | 
    
      | The marketing claims     we  and  Veridex  will be permitted to make in labeling or advertising     regarding our cancer diagnostic products, if cleared or approved by the FDA,     will be limited to those specified in any clearance or approval | 
    
      | We expect     that initially many of these products will be limited to research use only | 
    
      | In addition, both we and Veridex are subject to inspection and marketing     surveillance  by  the  FDA to determine our compliance with regulatory     requirements | 
    
      | If the FDA determines that we or Veridex have failed to comply     with these requirements, it can institute a wide variety of enforcement     actions, ranging from a public warning letter to more severe sanctions,     including:         Ø   fines, injunctions and civil penalties;         Ø   recall or seizure of our products or Veridex’s products;         Ø   operating restrictions, partial suspension or total shutdown of     production;         Ø   denial of requests for 510(k) clearances or PMAs of product candidates;         Ø   withdrawal of 510(k) clearances already granted;         Ø   disgorgement of profits; and         Ø   criminal prosecution | 
    
      | _________________________________________________________________         36      ______________________________________________________________________       Part I      _________________________________________________________________         Any of these enforcement actions could affect our ability or Veridex’s     ability to commercially distribute our products in the US and may also harm     our  ability  to  conduct the clinical trials necessary to support the     marketing, clearance or approval of these products | 
    
      | If the third-party manufacturers we rely on either refuse or are unable to     successfully  manufacture certain of our products, we may be unable to     commercialize these products | 
    
      | We have limited commercial manufacturing experience and capabilities | 
    
      | We     currently assemble or perform final assembly, test and release of the CTAII     and  CellTracks  AutoPrep  System,  as well as bulk reagents and other     associated  products  used with the CellTracks AutoPrep System, at our     facility located in Huntingdon Valley, Pennsylvania | 
    
      | We currently have     adequate manufacturing capacity to meet anticipated demand for 2006 and     2007 | 
    
      | However, in order to meet anticipated demand thereafter, we will     likely have to expand our manufacturing processes and facilities or increase     our reliance on third-party manufacturers | 
    
      | Under our agreement with Veridex,     we might be required to establish a third manufacturing facility or qualify     a contract manufacturer in the future | 
    
      | We might encounter difficulties in     expanding our manufacturing processes and facilities or in expanding our     relationships with third-party manufacturers and might be unsuccessful in     overcoming these difficulties | 
    
      | In that event, our ability to meet product     demand could be impaired or delayed | 
    
      | We  face additional risks inherent in operating a single manufacturing     facility  for  those products we manufacture ourselves | 
    
      | We do not have     alternative production plans in place or alternative facilities available at     this time | 
    
      | If there are unforeseen shutdowns to our facility, we will be     unable to satisfy customer orders on a timely basis with respect to these     products | 
    
      | We rely currently and intend to continue to rely significantly in     the future on third-party manufacturers to produce some of our products | 
    
      | For     example, we are dependent on a small, private contract design, engineering     and manufacturing company, Astro Instrumentation, LLC, or Astro, for our     CellTracks AutoPrep System and for certain components of the CTAII If Astro     loses key personnel or encounters financial or other difficulties, they may     be unable to continue to manufacture this system and provide ongoing design     and engineering support for commercialization and future enhancements of     this system, and we may have difficulty replacing them | 
    
      | In addition, we     currently use a third-party manufacturer for our CellSave Preservative Tube | 
    
      | We  are  dependent on these third-party manufacturers to perform their     obligations in a timely and effective manner and in compliance with FDA and     other regulatory requirements | 
    
      | If these third-party manufacturers fail to     perform their obligations, our competitive position and ability to generate     revenue could be adversely affected in a number of ways, including:         Ø   we might not be able to initiate or continue clinical trials on products     that are under development;         Ø   we might be delayed in submitting applications for regulatory approvals     and clearances for products; and         Ø   we might not be able to meet commercial demands for any approved or     cleared products | 
    
      | Any failures in manufacturing these products may also result in a breach of     our agreement with Veridex | 
    
      | If  third-party payors do not reimburse customers for our products and     Veridex’s  products,  they might not be used or purchased, which would     adversely affect our revenues | 
    
      | The majority of the sales of our products and Veridex’s products based on     our technologies in the US and other markets will depend, in large part, on     the availability of adequate reimbursement to users of these products from     government insurance plans, including Medicare and Medicaid in the US,     managed       _________________________________________________________________                                                                            37      ______________________________________________________________________       Part I      _________________________________________________________________         care organizations, private insurance plans and other third-party payors | 
    
      | Because these products have only recently been commercially introduced,     third-party payors have limited history of reimbursing for the cost of these     products | 
    
      | Third-party payors are often reluctant to reimburse healthcare     providers for the use of medical diagnostic products incorporating new     technology | 
    
      | In addition, third-party payors are increasingly limiting     reimbursement  coverage  for  medical diagnostic products and, in many     instances, are exerting pressure on medical products suppliers to reduce     their  prices | 
    
      | Consequently,  third-party  reimbursement might not be     consistently available or adequate to cover the cost of our products or     changes may occur in the reimbursement policies of third-party payors | 
    
      | Any     of these events could limit our ability or Veridex’s ability to sell these     products or cause the prices of these products to be reduced, which would     adversely affect our operating results | 
    
      | Because  each  third-party  payor individually approves reimbursement,     obtaining these approvals is a time-consuming and costly process that will     require us and Veridex to provide scientific and clinical support for the     use of each of these products to each third-party payor separately with no     assurance that approval will be obtained | 
    
      | This process could delay the     market acceptance of new products and could have a negative effect on our     revenues and operating results | 
    
      | If we or any of our third-party manufacturers do not maintain high standards     of manufacturing in accordance with Quality System Regulations, our ability     to develop, and Veridex’s and our ability to commercialize our products,     could be delayed or curtailed | 
    
      | We and any third-party manufacturers on which we currently rely or will rely     in the future, including those we rely on to produce our CellTracks AutoPrep     System and CellSave Preservative Tube, must continuously adhere to the     current  good manufacturing practices, or cGMP, set forth in the FDA’s     Quality System Regulations, or QSR, and enforced by the FDA through its     facilities inspection program | 
    
      | In complying with QSR, we and any of our     third-party manufacturers must expend significant time, money and effort in     design and development, testing, production, record-keeping and quality     control to assure that our products meet applicable specifications and other     regulatory requirements | 
    
      | The failure to comply with these specifications and     other requirements could result in an FDA enforcement action, including the     seizure  of  products  and shut down of production | 
    
      | We or any of these     third-party  manufacturers  also  may be subject to comparable or more     stringent regulations of foreign regulatory authorities, which include     compliance with ISO 13485 2003 and the European Union’s in vitro Diagnostic     Directive 98/97/EC If we or any of our third-party manufacturers fail to     comply with these regulations, we might be subject to regulatory action,     which could delay or curtail our ability to develop, and Veridex’s and our     ability to commercialize, products based on our technologies | 
    
      | If we fail to obtain necessary funds for our operations, we will be unable     to continue to develop and commercialize new products and technologies | 
    
      | We expect capital outlays and operating expenditures to increase over the     next several years as we expand our infrastructure, commercialization,     manufacturing, clinical trials and research and development activities | 
    
      | Specifically, we will need to raise additional capital to, among other     things:         Ø   sustain commercialization with Veridex of our initial products;         Ø   pursue regulatory approvals and clearances;         Ø   expand our technologies into other areas of cancer and medicine;         Ø   expand our research and development activities;         Ø   acquire or license technologies;       _________________________________________________________________         38      ______________________________________________________________________       Part I      _________________________________________________________________         Ø   fund our clinical trial activities;         Ø   expand our manufacturing activities; and         Ø   finance capital expenditures and our general and administrative     expenses | 
    
      | To date, we have raised capital through private equity, public equity and     debt   financings,  license  and  milestone  revenues  from  corporate     collaborations, capital equipment and leasehold financing, government grants     and interest earned on cash and investments | 
    
      | However, our present and future     funding requirements will depend on many factors, including, among other     things:         Ø   the level of research and development investment required to maintain     and improve our technology position;         Ø   costs of filing, prosecuting, defending and enforcing patent claims and     other intellectual property rights;         Ø   our need or decision to acquire or license complementary technologies or     acquire complementary businesses;         Ø   changes in product development plans needed to address any difficulties     in manufacturing or commercialization;         Ø   competing technological and market developments; and         Ø   changes in regulatory policies or laws that affect our operations | 
    
      | We  do  not  know  whether  additional  financing will be available on     commercially acceptable terms when needed, if at all | 
    
      | If adequate funds are     not available or are not available on commercially acceptable terms, our     ability  to  fund  our operations, develop products or technologies or     otherwise respond to competitive pressures could be significantly delayed or     limited, and we might need to downsize or halt our operations | 
    
      | If we raise additional funds by issuing equity securities, further dilution     to  our stockholders could result, and new investors could have rights     superior to those of our existing shareholders | 
    
      | Any equity securities issued     also may provide for rights, preferences or privileges senior to those of     holders of our common stock | 
    
      | If we raise additional funds by issuing debt     securities,  these  debt securities would have rights, preferences and     privileges senior to those of holders of our common stock, and the terms of     the debt securities issued could impose significant restrictions on our     operations | 
    
      | If  we  raise additional funds through collaborations and     licensing arrangements, we might be required to relinquish significant     rights to our technologies or products, or grant licenses on terms that are     not favorable to us | 
    
      | If adequate funds are not available, we may have to     delay or may be unable to continue to develop our products | 
    
      | If the third parties with which we intend to contract with for clinical     trials do not perform in an acceptable manner, or if we suffer setbacks in     these clinical trials, our business may suffer | 
    
      | We do not have the ability to conduct independently the clinical trials     required to obtain regulatory clearances for our products | 
    
      | If we cannot locate and enter into favorable agreements with     acceptable third parties, or if these third parties do not successfully     carry out their contractual obligations, meet expected deadlines or follow     regulatory requirements, including clinical laboratory, manufacturing and     good  clinical  practice  guidelines, then we may be the subject of an     enforcement action by the FDA or some other regulatory body, and may be     unable to obtain clearances for our products or to commercialize them on a     timely basis, if at all | 
    
      | _________________________________________________________________                                                                            39      ______________________________________________________________________       Part I      _________________________________________________________________         The completion of clinical trials of our products may be delayed by many     other factors, including the rate of enrollment of patients | 
    
      | Neither we nor     any third-party clinical investigators and CROs can control the rate of     patient  enrollment,  and  this  rate might not be consistent with our     expectations or sufficient to enable clinical trials of our products to be     completed  in  a timely manner or to be completed at all | 
    
      | In addition,     regulatory authorities might not permit us to undertake additional clinical     trials for one or more of these products | 
    
      | Currently, we have two important     labeling trials underway in colorectal and prostate cancer | 
    
      | If we suffer any     significant delays, setbacks or negative results in, or termination of,     these clinical trials or our other clinical trials for our products, we may     be unable to generate product sales from these products in the future | 
    
      | If we lose key management or scientific personnel, scientific collaborators     or other advisors, our business would suffer | 
    
      | Our success depends, in large part, on the efforts and abilities of Byron D     Hewett,  who is our President and Chief Executive Officer, Leon WMM     Terstappen, who is our Senior Vice President of Research and Development and     Chief  Scientific Officer, and James G Murphy, who is our Senior Vice     President of Finance and Administration and Chief Financial Officer, as well     as  the  other members of our senior management and our scientific and     technical personnel | 
    
      | Erickson notified our board of     directors  of his intention to step down as Chief Executive Officer on     March 31, 2006 | 
    
      | Given that the pool of individuals with relevant experience     in biotechnology and diagnostic products in particular is limited, it would     be costly and time-consuming to replace any of our senior management or     scientific personnel | 
    
      | Although we maintain key-person life insurance on     Dr | 
    
      | Terstappen, we do not maintain key-person life insurance on any of our     other officers, employees or consultants | 
    
      | We also depend on our scientific     collaborators and other advisors, particularly with respect to our research     and development efforts | 
    
      | If we lose the services of one or more of our key     officers, employees or consultants, or are unable to retain the services of     our  scientific  collaborators  and  other  advisors, our research and     development and product development efforts could be delayed or curtailed | 
    
      | If Veridex and the other third-parties on which we currently rely or may     rely in the future to perform marketing, sales and distribution services for     our products do not successfully perform these services, our business will     be harmed | 
    
      | We  have  limited  marketing,  sales  and  distribution experience and     capabilities | 
    
      | In order to commercialize any of our products, we must either     internally develop sales, marketing and distribution capabilities or make     arrangements with third parties to perform these services | 
    
      | We currently     rely, and we intend to rely for the foreseeable future on sales, marketing     and distribution arrangements with third parties for the commercialization     of our products | 
    
      | Specifically, we rely on Veridex for the commercialization     of cancer diagnostic products based on our technologies | 
    
      | We may be unable to     enter into sales, marketing and distribution agreements with third parties     on acceptable terms, if at all | 
    
      | Also, the sales, marketing, and distribution     efforts of these third parties might not be successful | 
    
      | Any sales through     these third parties might be less profitable to us than direct sales | 
    
      | If we decide to perform any sales, marketing and distribution functions     ourselves, we might face a number of risks, including:         Ø   the inability to attract and build the significant and skilled marketing     staff or sales force necessary to commercialize and gain market acceptance     for our products;         Ø   the amount of time and cost of establishing a marketing staff or sales     force might not be justifiable by the revenues generated by any particular     product; and         Ø   the failure of our direct sales and marketing personnel to initiate and     execute successful commercialization activities | 
    
      | _________________________________________________________________         40      ______________________________________________________________________       Part I      _________________________________________________________________         If the limited number of suppliers on which we rely fail to supply the raw     materials we use in the manufacturing of our reagent products, we might be     unable  to  satisfy  product demand, which would negatively impact our     business | 
    
      | Some of the raw materials used in the manufacturing of our reagent products     used in several of our platforms and instruments currently are available     only  from  a limited number of suppliers | 
    
      | We acquire all of these raw     materials on a purchase-order basis, which means that the supplier is not     required to supply us with specified quantities of these raw materials over     a certain period of time or to set aside part of its inventory for our     forecasted requirements | 
    
      | Additionally, for certain of these raw materials,     we have not arranged for alternative suppliers, and it might be difficult to     find alternative suppliers in a timely manner and on terms acceptable to us | 
    
      | Consequently, as we continue our commercialization efforts, if we do not     forecast properly, or if our suppliers are unable or unwilling to supply us     in sufficient quantities or on commercially acceptable terms, we might not     have access to sufficient quantities of these raw materials on a timely     basis and might not be able to satisfy product demand | 
    
      | In addition, if any of these components and raw materials are no longer     available in the marketplace, we will be forced to further develop our     technologies to incorporate alternate components and to do so in compliance     with QSR and other quality standards, such as ISO 13485 | 
    
      | If we incorporate     new components or raw materials into our products we might need to seek and     obtain additional approvals or clearances from the FDA or foreign regulatory     agencies, which could delay the commercialization of these products | 
    
      | If  our  competitors  develop  and market technologies or research and     diagnostic products faster than we or Veridex do or if those products are     more effective than our products, our commercial opportunities will be     reduced or eliminated | 
    
      | The extent to which any of our technologies and products achieve market     acceptance will depend on many competitive factors, many of which are beyond     our control | 
    
      | Competition in the pharmaceutical and biotechnology industries,     and the medical devices and diagnostic products segments in particular, is     intense  and  has  been accentuated by the rapid pace of technological     development | 
    
      | Our competitors include large diagnostics and life sciences     companies | 
    
      | Most of these entities have substantially greater research and     development  capabilities  and  financial,  scientific, manufacturing,     marketing, sales and service resources than we do | 
    
      | Some of them also have     more experience than we do in research and development, clinical trials,     regulatory matters, manufacturing, marketing and sales | 
    
      | These organizations     also compete with us to:         Ø   pursue acquisitions, joint ventures or other collaborations;         Ø   license proprietary technologies that are competitive with our     technologies;         Ø   attract funding; and         Ø   attract and hire scientific talent | 
    
      | If we or Veridex cannot successfully compete with new or existing products     or technologies, sales of our products will suffer and we may never achieve     profitability | 
    
      | Because of their greater experience with commercializing     their technologies and larger research and development capabilities, our     competitors might succeed in developing and commercializing technologies or     products earlier and obtaining regulatory approvals and clearances from the     FDA more rapidly than Veridex or us | 
    
      | Our competitors also might develop more     effective technologies or products that are more predictive, more highly     automated or more cost-effective, which may render our technologies or     products obsolete or non-competitive | 
    
      | _________________________________________________________________                                                                            41      ______________________________________________________________________       Part I      _________________________________________________________________         If we experience delays in the development of new products or delays in     planned improvements to our products, our commercial opportunities will be     reduced | 
    
      | To improve our competitive position, we believe that we will need to develop     new products as well as improve our existing instruments and software,     reagents  and  ancillary  products | 
    
      | Improvements in operator workflow,     automation and throughput (the number of tests that can be performed in a     specified period of time) for our products will be important to maintain a     competitive position of our products as we market to a broader, perhaps less     technically proficient, group of customers | 
    
      | Our ability to develop new     products  and  make  improvements  in  our products may face difficult     technological challenges leading to development delays | 
    
      | For example, we had     experienced delays in connection with the development of our laser-based     CellTracks Analyzer cell analysis instrument for use in cancer diagnostic     testing | 
    
      | These delays were the result of technical problems associated with     reliability of the system to detect cancer cells | 
    
      | In response, in June 2005,     we introduced a second generation instrument, the CellTracks Analyzer II,     which, among other improvements over our current CellSpotter Analyzer,     implements enhancements such as the automation of data acquisition and     enhanced detection of CTCs and other types of cells | 
    
      | We are also continuing     to develop our analyzer platforms further because we believe that some of     the planned features, such as foreign language capability of our software     and the ability to quantify cellular markers using ASRs, may be required to     remain  competitive and address future potential research and clinical     applications | 
    
      | If we are unable to successfully complete development of new     products or planned enhancements to our products, in each case without     significant  delays,  our future competitive position may be adversely     affected | 
    
      | If product liability lawsuits are successfully brought against us, we might     incur  substantial  liabilities  and  could  be  required to limit the     commercialization of our products | 
    
      | Our  business exposes us to potential product liability risks that are     inherent in the testing, manufacturing, marketing and sale of diagnostic     products | 
    
      | We might be unable to avoid product liability claims | 
    
      | Product     liability insurance generally is expensive for our industry | 
    
      | If we are     unable to maintain sufficient insurance coverage on reasonable terms or to     otherwise protect against potential product liability claims, we may be     unable to commercialize our products | 
    
      | A successful product liability claim     brought against us in excess of any insurance coverage we have at that time     could cause us to incur substantial liabilities and our business to fail | 
    
      | If we use biological and hazardous materials in a manner that causes injury,     we could be liable for damages | 
    
      | Our research and development activities sometimes involve the controlled use     of  potentially  harmful biological materials, hazardous materials and     chemicals | 
    
      | We  cannot  completely  eliminate  the  risk of accidental     contamination or injury to third parties from the use, storage, handling or     disposal of these materials | 
    
      | In the event of contamination or injury, we     could be held liable for any resulting damages, and any liability could     exceed our resources or any applicable insurance coverage we may have | 
    
      | Additionally, we are subject on an ongoing basis to federal, state and local     laws and regulations governing the use, storage, handling and disposal of     these materials and specified waste products | 
    
      | The cost of compliance with     these laws and regulations might be significant and could negatively affect     our profitability | 
    
      | If we are unable to manage growth in connection with our transition from an     early-stage development company to a company that commercializes research     and diagnostic products, our operations will suffer | 
    
      | We may need to add a significant number of new personnel and expand our     capabilities in order to successfully pursue our commercialization strategy     for our initial IVD products as well as our research       _________________________________________________________________         42      ______________________________________________________________________       Part I      _________________________________________________________________         and development efforts | 
    
      | Certain aspects of our operations may need to be     scaled up, for example, to increase the batch sizes of antibodies and other     bulk  components that we will need to provide for use in the test kits     manufactured  by  Veridex  and the number of instrument systems we can     manufacture per quarter | 
    
      | Organizational growth and scale-up of operations     could strain our existing managerial, operational, financial and other     resources | 
    
      | If we fail to manage this growth effectively, we may not be able     to achieve our research and development and commercialization goals | 
    
      | RISKS RELATED TO OUR INTELLECTUAL PROPERTY          If we are unable to protect our proprietary rights, we may not be able to     compete effectively | 
    
      | We have obtained patents in the US and in foreign countries relating to many     of the technologies that are the basis of our products, such as the basic     technologies relating to the separation and isolation of cells for the     detection of cancer and the various aspects of the reagents, methods and     instrument platforms that we are commercializing or plan to commercialize | 
    
      | In addition, we maintain trade secrets, especially where we believe patent     protection is not appropriate or obtainable, on various aspects of our     technologies and that we do not wish to become publicly known | 
    
      | However,     obtaining,  defending and enforcing our patents and other intellectual     property rights involve complex legal and factual questions | 
    
      | For example,     many  of  our  key  patents relating to our basic technologies for the     separation and isolation of cells for the detection of cancer contain claims     covering our processes for manufacturing and using our magnetic separation     particles, or ferrofluids | 
    
      | If a competitor were to practice or use these     processes  without  our  knowledge  or  consent,  these patents may be     particularly difficult to defend or enforce because it may not be apparent     from examination of the competitor’s products that the competitor is using     our patented processes | 
    
      | In particular, if we were not able successfully to     defend or enforce our patents that cover our ferrofluids, which are utilized     as a key component of our CellTracks AutoPrep System, competitors could more     easily produce systems that might be able to perform separation of CTCs from     blood  samples  in a manner substantially equivalent to our CellTracks     AutoPrep System without compensating us, resulting in substantial damage to     our business | 
    
      | Because  the issuance of a patent is not conclusive of its validity or     enforceability and can be challenged, we do not know how much protection, if     any, our patents will provide to us if we attempt to enforce them or if     others challenge their validity or enforceability in court | 
    
      | For example, if     our patents relating to the separation of CTCs from blood samples were     challenged and invalidated, we would not be able to prevent others from     utilizing these key aspects of our technologies, which would substantially     harm our business | 
    
      | Moreover, our patent applications may not result in     issued patents, and even if issued, our patents may not contain claims that     are sufficiently broad to prevent others from practicing our technologies or     developing competing products | 
    
      | Accordingly, we cannot assure you that we     will be able to obtain, defend or enforce our patent rights covering our     technologies in the US or in foreign countries | 
    
      | In addition, if others     discover or misappropriate the technologies that we have chosen to maintain     as  trade  secrets,  we  may  not  be able to effectively maintain our     technologies as unpatented trade secrets | 
    
      | Although we have taken measures to     protect our unpatented trade secrets and other non-public information such     as know-how, including the use of confidentiality and invention assignment     agreements with our employees, consultants and some of our contractors, it     is possible that these persons may unintentionally or willingly breach the     agreements or that our competitors may independently develop or otherwise     discover our trade secrets and know-how | 
    
      | A challenge to one or more of our pending patent applications, or issued     patents,  may result in limiting the coverage of our patents so that a     competitor can effectively avoid our patent claims | 
    
      | In addition, competitors     may avoid our patents by using technologies that perform in substantially     the same manner as our technologies, but avoid infringing our patent claims | 
    
      | For example, if a competitor were to use a       _________________________________________________________________                                                                            43      ______________________________________________________________________       Part I      _________________________________________________________________         cell separation technology that performs as well, or nearly as well, as our     patented ferrofluids, the competitor may be able to market products that may     be functionally equivalent and perform as well or nearly as well as our     products, thereby diminishing the competitive advantage afforded by our     issued patents | 
    
      | Although we may initiate litigation to stop the infringement of our patent     claims  or  to  attempt  to force an unauthorized user of our patented     inventions  or  trade secrets to compensate us for the infringement or     unauthorized use, patent and trade secret litigation is complex and often     difficult and expensive, and would consume the time of our management and     other significant resources | 
    
      | If the outcome of litigation is adverse to us,     third parties may be able to use our technologies without payments to us | 
    
      | Moreover, some of our competitors may be better able to sustain the costs of     litigation because they have substantially greater resources | 
    
      | Because of     these  factors relating to litigation, we may be unable effectively to     prevent misappropriation of our patent and other proprietary rights | 
    
      | If the use of our technologies conflicts with the intellectual property     rights of third-parties, we may incur substantial liabilities and we may be     unable to commercialize products based on these technologies in a profitable     manner, if at all | 
    
      | Our competitors or others may have or acquire patent rights that they could     enforce  against  us | 
    
      | If  they do so, we may be required to alter our     technologies, pay licensing fees or cease activities | 
    
      | If our technologies     conflict with patent rights of others, third parties could bring legal     action against us or our licensees, suppliers, customers or collaborators,     claiming damages and seeking to enjoin manufacturing and marketing of the     affected products | 
    
      | If these legal actions are successful, in addition to any     potential liability for damages, we might have to obtain a license in order     to continue to manufacture or market the affected products | 
    
      | A required     license under the related patent may not be available on acceptable terms,     if at all | 
    
      | We may be unaware of issued patents that our technologies infringe | 
    
      | Because     patent applications can take many years to issue, there may be currently     pending applications, unknown to us, that may later result in issued patents     upon which our technologies may infringe | 
    
      | There could also be existing     patents of which we are unaware upon which our technologies may infringe | 
    
      | In     addition,  if third parties file patent applications or obtain patents     claiming technology also claimed by us in pending applications, we may have     to participate in interference proceedings in the US Patent and Trademark     Office to determine priority of invention | 
    
      | If third parties file oppositions     in  foreign  countries,  we may also have to participate in opposition     proceedings in foreign tribunals to defend the patentability of the filed     foreign patent applications | 
    
      | We may also have to participate in interference     proceedings involving our issued patents or our pending applications | 
    
      | If a third-party claims that we infringe upon its proprietary rights, any of     the following may occur:         Ø   we may become involved in time-consuming and expensive litigation, even     if the claim is without merit;         Ø   we may become liable for substantial damages for past infringement if a     court decides that our technologies infringe upon a competitor’s patent;         Ø   a court may prohibit us from selling or licensing our product without a     license from the patent holder, which may not be available on commercially     acceptable terms, if at all, or which may require us to pay substantial     royalties or grant cross licenses to our patents; and         Ø   we may have to redesign our product so that it does not infringe upon     others’ patent rights, which may not be possible or could require     substantial funds or time | 
    
      | If any of these events occurs, our business will suffer and the market price     of our common stock will likely decline | 
    
      | _________________________________________________________________         44      ______________________________________________________________________       Part I      _________________________________________________________________         Our rights to use technologies licensed to us by third parties are not     within our control, and we may not be able to implement our products without     these technologies | 
    
      | We  have  licensed  patents  and  other  rights  that are necessary to     commercialize our products | 
    
      | Our business will significantly suffer if these     licenses terminate, if the licensors fail to abide by the terms of the     license or fail to prevent infringement by third parties or if the licensed     patents or other rights are found to be invalid | 
    
      | We have exclusively in-licensed significant intellectual property, including     patents and know-how, related to our cell analysis instrumentation and cell     isolation and enrichment products | 
    
      | In September 1999, we entered into a     license agreement with the University of Texas, or Texas, under which we     were granted exclusive rights to technology, including patents and know-how,     which we developed in collaboration with Texas, relating to the isolation,     enrichment and characterization of CTCs | 
    
      | CTCs are cells that cover external     and internal body surfaces and give rise to the majority of solid tumors | 
    
      | This  technology  and  the  underlying patents and know-how contribute     significantly  to  our  cell  analysis products in the field of cancer     diagnostics | 
    
      | We are responsible for making royalty payments of 1prca of our     sales of reagents incorporating the intellectual property licensed to us     under this agreement | 
    
      | This agreement terminates when all of Texas’s rights     to  the  licensed  technologies  expire | 
    
      | In  addition, Texas also may     unilaterally terminate this agreement if we are in material breach or become     bankrupt or insolvent | 
    
      | Texas also may unilaterally terminate the license     granted under this agreement, or the exclusivity of such license, in any     national political jurisdiction if we fail to provide written evidence     satisfactory to Texas, within 90 days of receiving written notice from Texas     that it intends to terminate this license, that we or our sublicensees have     commercialized  or are actively attempting to commercialize a licensed     invention in these jurisdictions | 
    
      | In addition, in July 2002, we entered into     a license agreement with Streck | 
    
      | Under this agreement, Streck granted to us     a non-exclusive, worldwide, royalty-bearing license to practice certain of     Streck’s cell preservative technology, including patents and know-how, for     the research, development, manufacture and sale of our CellSave Preservative     Tube to test for the presence of epithelial cells or CTCs in a sample of     fluid from a patient | 
    
      | This agreement will terminate upon the expiration date     of the last to expire of the patents licensed under this agreement | 
    
      | In     addition, either party also may terminate this agreement if the other party     is  in  material breach or becomes involved in financial difficulties,     including bankruptcy and insolvency | 
    
      | If we violate the terms of our licenses, or otherwise lose our rights to     these  patents  or  patent  applications, we may be unable to continue     development of our products | 
    
      | Our licensors or others may dispute the scope     of our rights under any of these licenses | 
    
      | Additionally, the licensors under     these licenses might breach the terms of their respective agreements or fail     to prevent infringement of the licensed patents by third parties | 
    
      | Loss of     any of these licenses for any reason could materially harm our financial     condition and operating results | 
    
      | If we cannot obtain additional licenses to intellectual property owned by     third parties that we desire to incorporate into new products we plan to     develop,  we  may not be able to develop or commercialize these future     products | 
    
      | We are developing products designed to identify and characterize additional     types of cells other than CTCs and epithelial cells, such as endothelial     cells | 
    
      | We are also developing cell profile and molecular products using     reagents that are fluorescently tagged antibodies and/or probes designed to     characterize target cells, which may be classified by the FDA as analyte     specific  reagents, or ASRs | 
    
      | ASRs can be used in research as an aid in     evaluating new therapies in clinical trials, and we plan to develop a family     of ASRs for profiling of each rare cell type of interest | 
    
      | However, many, if     not all, of the target-specific and       _________________________________________________________________                                                                            45      ______________________________________________________________________       Part I      _________________________________________________________________         other reagents, including antibodies and probes, that we ultimately may use     in  the development and commercialization of these future cell profile     products and in our future products for identifying additional types of     cells may be protected by patent and other intellectual property rights     owned  by third parties | 
    
      | If we are unable to obtain rights to use this     third-party intellectual property under commercially reasonable terms, or at     all, we may be unable to develop these products, and this could harm our     ability  to  expand  our commercial products offerings and to generate     additional revenue from these products | 
    
      | RISKS RELATING TO OUR COMMON STOCK          The market price of our common stock may be highly volatile | 
    
      | We cannot assure you that an active trading market for our common stock will     exist at any time | 
    
      | For the year ended December 31, 2005, our average daily trading     volume  was  approximately  106cmam000  shares | 
    
      | Substantially all of the     27dtta5 million shares outstanding are eligible for sale in the public market | 
    
      | The trading price of our common stock is likely to be highly volatile and     could  be subject to wide fluctuations in price in response to various     factors, many of which are beyond our control, including:         Ø   actual or anticipated results of our clinical trials;         Ø   actual or anticipated regulatory approvals of our products or of     competing products;         Ø   changes in laws or regulations applicable to our products;         Ø   changes in the expected or actual timing of our development programs;         Ø   actual or anticipated variations in quarterly operating results;         Ø   announcements of technological innovations by us, our collaborators or     our competitors;         Ø   new products or services introduced or announced by us or our     competitors;         Ø   changes in financial estimates or recommendations by securities     analysts;         Ø   conditions or trends in the biotechnology and pharmaceutical industries;         Ø   changes in the market valuations of similar companies;         Ø   announcements by us of significant acquisitions, strategic partnerships,     joint ventures or capital commitments;         Ø   additions or departures of key personnel;         Ø   disputes or other developments relating to proprietary rights, including     patents, litigation matters and our ability to obtain patent protection for     our technologies;         Ø   the loss of a collaborator, including Veridex;         Ø   developments concerning our collaborations;         Ø   trading volume of our common stock; and         Ø   sales of our common stock by us or our stockholders | 
    
      | In addition, the stock market in general, the Nasdaq National Market and the     market for technology companies in particular have experienced extreme price     and volume fluctuations that have often been unrelated or disproportionate     to the operating performance of those companies | 
    
      | Further, there has been       _________________________________________________________________         46      ______________________________________________________________________       Part I      _________________________________________________________________         particular volatility in the market prices of securities of biotechnology     and life sciences companies | 
    
      | These broad market and industry factors may     seriously harm the market price of our common stock, regardless of our     operating performance | 
    
      | In the past, following periods of volatility in the     market, securities class-action litigation has often been instituted against     companies | 
    
      | Such litigation, if instituted against us, could result in     substantial costs and diversion of management’s attention and resources | 
    
      | The future sale of our common stock and the exercise of outstanding options     and warrants could negatively affect our stock price and cause dilution | 
    
      | As of December 31, 2005, options to purchase 3cmam302cmam480 shares of our common     stock  and warrants to purchase 42cmam169 shares of our common stock were     outstanding | 
    
      | A total of 1cmam358cmam796 of the outstanding options and warrants     are “in the money” and exercisable as of December 31, 2005 | 
    
      | “In the money”     means  that  the current market price of the common stock is above the     exercise price of the shares subject to the warrant or option | 
    
      | The issuance     of  common stock upon the exercise of these options and warrants could     adversely  affect  the  market  price of the common stock or result in     substantial dilution to our existing stockholders | 
    
      | As of December 31, 2005     we also had restricted shares grants totaling 260cmam000 outstanding | 
    
      | These     grants represent outright grants of our common stock which will vest as     follows, 160cmam000 shares in 2008 and 100cmam000 in 2009 | 
    
      | The issuance of common     stock upon the exercise of these options, warrants and restricted common     stock grants could adversely affect the market price of the common stock or     result in substantial dilution to our existing stockholders | 
    
      | If the price and volume of our common stock experience fluctuations, this     could lead to costly litigation for us | 
    
      | Because we have a limited operating history and operate within the medical     devices  and  diagnostic  products  segments of the pharmaceutical and     biotechnology industries, our stock price is likely to be volatile | 
    
      | The     market  price of our common stock may fluctuate substantially due to a     variety of factors, including:         Ø   results of our clinical trials related to developing multiple     indications for our cancer diagnostic products, such as those related to     colorectal, lung or other solid tissue cancers, or expanding the     applications of our technologies to fields of medicine other than cancer,     such as cardiovascular and infectious diseases;         Ø   changes in reimbursement policies concerning the diagnostic products     that we or our competitors offer;         Ø   media reports and publications and announcements about cancer or     diagnostic products or new cancer treatments or innovations that could     compete with our products;         Ø   announcements concerning our competitors or the medical devices and     diagnostic products segments in general;         Ø   new regulatory pronouncements, changes in regulatory guidelines, such as     adverse changes in reimbursement for cancer diagnostic products, and timing     of regulatory approvals concerning the products in our pipeline;         Ø   market conditions or trends related to the medical diagnostics and     biotechnology industries or the market in general;         Ø   additions to or departures of our key personnel, in particular, the loss     of, Byron D Hewett, our President and Chief Executive Officer, Leon WMM     Terstappen, our Chief Scientific Officer, and James G Murphy, our Chief     Financial Officer;       _________________________________________________________________                                                                            47      ______________________________________________________________________       Part I      _________________________________________________________________         Ø   disputes or other developments relating to proprietary rights, including     patents, litigation matters and our ability to obtain patent protection for     our technologies;         Ø   changes in financial estimates or recommendations by securities     analysts;         Ø   variations in our quarterly financial and operating results; and         Ø   changes in accounting principles | 
    
      | The  market  prices  of the securities of biotechnology and diagnostic     companies, particularly companies like ours without consistent product     revenues and earnings, have been highly volatile and are likely to remain     highly volatile in the future | 
    
      | This volatility has often been unrelated to     the operating performance of particular companies | 
    
      | Moreover, market prices     for stocks of biotechnology-related companies, particularly following an     initial public offering, frequently reach levels that bear no relationship     to  the  operating performance of these companies | 
    
      | These market prices     generally  are  not  sustainable and are highly volatile | 
    
      | In the past,     companies that experience volatility in the market price of their securities     have  often  faced  securities class action litigation | 
    
      | Whether or not     meritorious, litigation brought against us could result in substantial     costs, divert our management’s attention and resources and harm our ability     to grow our business | 
    
      | Anti-takeover provisions in our certificate of incorporation and bylaws and     under  Delaware  law  could inhibit a change in control or a change in     management that holders of our common stock consider favorable | 
    
      | Provisions in our certificate of incorporation and bylaws could delay or     prevent a change of control or change in management that would provide     holders of our common stock with a premium to the market price of our common     stock | 
    
      | These provisions include those:         Ø   authorizing the issuance without further approval of “blank check”     preferred stock that could be issued by our board of directors to increase     the number of outstanding shares and thwart a takeover attempt;         Ø   prohibiting cumulative voting in the election of directors, which would     otherwise allow less than a majority of stockholders to elect director     candidates;         Ø   limiting the ability to remove directors;         Ø   limiting the ability of stockholders to call special meetings of     stockholders;         Ø   prohibiting stockholder action by written consent, thereby requiring all     stockholder actions to be taken at a meeting of stockholders; and         Ø   establishing advance notice requirements for nominations for election to     the board of directors or for proposing matters that can be acted upon by     stockholders at stockholder meetings | 
    
      | In addition, Section 203 of the General Corporation Law of the State of     Delaware,  as  amended, or the Delaware General Corporation Law limits     business combination transactions with 15 percent stockholders that have not     been approved by our board of directors | 
    
      | These provisions and others could     make it difficult for a third-party to acquire us, or for members of our     board of directors to be replaced, even if doing so would be beneficial to     our  stockholders | 
    
      | Because  our board of directors is responsible for     appointing the members of our management team, these provisions could in     turn affect any attempt to replace the current management team | 
    
      | If a change     of control or change in management is delayed or prevented, holders of our     common stock may lose an opportunity to realize a premium on their shares of     common stock or the market price of our common stock could decline | 
    
      | _________________________________________________________________         48      ______________________________________________________________________       Part I      _________________________________________________________________         We do not expect to pay dividends in the foreseeable future | 
    
      | As a result,     holders of our common stock must rely on stock appreciation for any return     on their investment | 
    
      | We  do not anticipate paying cash dividends on our common stock in the     foreseeable future | 
    
      | Certain of our existing credit agreements prohibit the     payment  of cash dividends without lender consent | 
    
      | Any payment of cash     dividends  will  also  depend  on  our financial condition, results of     operations,  capital requirements and other factors and will be at the     discretion of our board of directors | 
    
      | Accordingly, holders of our common     stock will have to rely on capital appreciation, if any, to earn a return on     their investment in our common stock | 
    
      | Furthermore, we may in the future     become subject to contractual restrictions on, or prohibitions against, the     payment of dividends |