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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              --------------------
                                    FORM 8-K

                                 CURRENT REPORT
                                   PURSUANT TO

                             SECTION 13 OR 15(D) OF



                       THE SECURITIES EXCHANGE ACT OF 1934






      DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): SEPTEMBER 26, 1997
                              --------------------
                             CYTOTHERAPEUTICS, INC.
             (Exact name of registrant as specified in its charter)

       DELAWARE                       0-19871                   04-3078125

(State or other jurisdiction   (Commission File Number)      (I.R.S. Employer
 of incorporation)                                        Identification Number)



                          701 GEORGE WASHINGTON HIGHWAY
                           LINCOLN, RHODE ISLAND 02865

          (Address of principal executive offices, including zip code)



                                 (401) 288-1000

               (Registrant's telephone number including area code)

                               TWO RICHMOND SQUARE
                         PROVIDENCE, RHODE ISLAND 02906

             (Former name or address, if changed since last report)
                              --------------------




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                               PAGE 1 OF 9 PAGES.
                            EXHIBIT INDEX ON PAGE 5.

                                       -1-







         This report may contain certain  forward-looking  statements regarding,
among other things,  CTI's results of operations,  the progress of CTI's product
development  and  clinical  programs,  the need for,  and timing of,  additional
capital and capital expenditures,  partnering prospects, the need for additional
intellectual  property rights,  effects of regulations,  the need for additional
facilities  and potential  market  opportunities.  CTI's actual results may vary
materially from those contained in such  forward-looking  statements  because of
risks to which CTI is subject such as risks of delays in  research,  development
and  clinical  testing  programs,  obsolescence  of  CTI's  technology,  lack of
available   funding,   competition   from  third   parties,   failure  of  CTI's
collaborators  to  perform,   failure  to  consummate   proposed   transactions,
regulatory constraints,  litigation and other risks to which CTI is subject. See
"Cautionary  Factors Relevant to  Forward-Looking  Statements" filed herewith as
Exhibit 99 and incorporated herein by reference.

ITEM 2.  ACQUISITION OF ASSETS

         On September 26, 1997,  CytoTherapeutics,  Inc.  ("CTI")  announced the
closing  of the  merger of  StemCells,  Inc.  ("StemCells")  and a  wholly-owned
subsidiary of CTI.  Through the merger,  CTI acquired  StemCells in exchange for
1,580,000   newly  issued  shares  of  CTI's  common  stock,   $.01  par  value.
Simultaneously with the acquisition of StemCells,  Richard M. Rose, M.D., became
President, Chief Executive Officer and a Director of CTI and Dr. Irving Weissman
became a Director of CTI.

         Upon the  consummation  of the  merger,  CTI  entered  into  consulting
arrangements with the principal scientific founders of StemCells including,  Dr.
Weissman, of Stanford University,  Fred Gage, Ph.D., of Salk Institute and David
Anderson,  of the  California  Institute  of  Technology  and the Howard  Hughes
Medical Institute. Under the terms of the consulting arrangements,  each of Drs.
Weissman,  Gage and Anderson will join CTI's Scientific  Advisory Board with Dr.
Weissman serving as the Chairman of the Scientific Advisory Board.

         To attract and retain Drs. Rose,  Weissman,  Gage and Anderson,  and to
move CTI's  expanded stem cell program  forward,  CTI awarded these  individuals
options to acquire a total of  approximately  one million  six hundred  thousand
shares  of  CTI  common  stock,  at  an  exercise  price  of  $5.25  per  share;
approximately 94,000 of these options are excercisable immediately,  1.1 million
of  these  options  vest  and  become  exercisable  only on the  achievement  of
specified  milestones  related to CTI's stem cell development  program,  such as
corporate  partnering  events,  the initiation of clinical trials and regulatory
filings and approvals; and the remaining 500,000 options vest over eight years.

         Conduct of the stem cells research  following  completion of the merger
will be conducted  pursuant to the  provisions  of an agreement  between CTI and
Drs.  Weissman and Gage  providing for a two year research plan. If the goals of
the research plan are accomplished,  the stem cells research will continue to be
conducted  under an  extension  of such  Research  Plan  approved  by a Research
Committee  consisting  of two  persons  chosen by Drs.  Gage and  Weissman,  two
persons  chosen by CTI and a fifth member  appointed by Drs.  Gage and Weissman,
subject to the  reasonable  approval of CTI.  Increases  in stem cells  research
funding of not more than 25% a year approved by the Committee  will be funded by
CTI as long as the goals of the Research Plan are being met, provided,  however,
that CTI will retain the option of ceasing or reducing neural stem cell research
even if all Research Plan goals are being met by accelerating the vesting of all

                                       -2-






still-achievable  performance-based  options and ceasing or reducing  non-neural
stem  cell  research  even if all Plan  goals are  being  met by  affording  the
scientific  founders the  opportunity to continue  development of the non-neural
stem cell research by licensing the  technology  related to such research to the
founders  in  exchange  for a  payment  to CTI  equal  to all  funding  for such
research, plus royalty payments.

ITEM 5.  OTHER EVENTS

         Construction  of CTI's new  headquarters  and research and  development
facility has recently been  completed at a cost of  approximately  $7.5 million.
CTI is currently in  negotiations  regarding  the possible sale and leaseback of
such facility.  In addition,  CTI is also involved in active  discussions with a
group of potential  investors regarding a possible investment in CTI's 50% owned
subsidiary,  Modex  Therapeutiques  S.A.,  including  the possible  sale to such
investors  of a  portion  of CTI's  current  ownership  interest.  As  currently
anticipated,  CTI would  reduce  its  current  ownership  in Modex to a minority
position,  receive  cash,  be relieved of certain  future  funding and milestone
obligations,  expand the field of  encapsulated  products  outside  the  central
nervous  system  which  are  exclusively   licensed  to  Modex  and  enter  into
arrangements to manufacture Modex products based on such licensed technology.

         The two  proposed  transactions  described  above  are the  subject  of
ongoing negotiations and no definitive agreements have been reached with respect
to either transaction; there can be no assurance that either transaction will be
completed or, if completed, will be completed on the terms described above.

ITEM 7.  EXHIBITS

     Exhibit 99        Cautionary Factors Relevant to Forward-Looking Statements

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                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                            CYTOTHERAPEUTICS,  INC.

                                            By /s/ Frederic A. Eustis III
                                               ---------------------------------
                                               Title:  Executive Vice President

Date:  October 2, 1997


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Exhibit Index                                                              Page
- -------------                                                              -----

Exhibit 99        Cautionary Factors Relevant to Forward-Looking            6
                  Statements
                                                       

                                                        


                                       -5-






                                                                      EXHIBIT 99


            CAUTIONARY FACTORS RELEVANT TO FORWARD-LOOKING STATEMENTS

CytoTherapeutics,  Inc.  (the  "Company")  wishes to  caution  readers  that the
following  important  factors,  among others, in some cases have affected and in
the future could affect the Company's results and could cause actual results and
needs of the Company to vary materially from forward-looking  statements made by
the Company on the basis of management's current  expectations.  The business in
which the  Company is engaged is rapidly  changing,  extremely  competitive  and
involves a high degree of risk,  and accuracy  with  respect to  forward-looking
projections is difficult. Cross-references in this Exhibit refer to the sections
of the Company's Annual Report on Form 10-K.

EARLY STAGE DEVELOPMENT; HISTORY OF OPERATING LOSSES -- Substantially all of the
Company's  revenues to date have been derived,  and for the  foreseeable  future
substantially all of the Company's revenues will be derived,  from collaborative
agreements,  research  grants and income earned on invested  funds.  The Company
will incur  substantial  operating  losses in the future as the Company conducts
its research,  development,  clinical trial and manufacturing activities.  There
can be no assurance that the Company will achieve revenues from product sales or
become profitable.

FUTURE CAPITAL NEEDS;  UNCERTAINTY OF ADDITIONAL  FUNDING -- The  development of
the Company's  products will require the commitment of substantial  resources to
conduct the time-consuming research, preclinical development and clinical trials
that are necessary for  regulatory  approvals  and to establish  production  and
marketing  capabilities if such approvals are obtained. The Company will need to
raise substantial  additional funds to continue its product  development efforts
and intends to seek such additional funds through partnership,  collaborative or
other  arrangements  with corporate  sponsors,  public or private equity or debt
financings,  or from  other  sources.  Future  cash  requirements  may vary from
projections based on changes in the Company's research and development programs,
progress in preclinical  and clinical  testing,  the Company's  ability to enter
into, and perform successfully under, collaborative agreements,  competitive and
technological  advances,  the need to obtain  proprietary  rights owned by third
parties,  facilities requirements,  regulatory approvals and other factors. Lack
of necessary funds may require the Company to delay, reduce or eliminate some or
all of its research and product development programs or to license its potential
products  or  technologies  to third  parties.  No  assurance  can be given that
funding will be available when needed,  if at all, or on terms acceptable to the
Company.

UNCERTAINTIES  OF  CLINICAL  DEVELOPMENT  AND NEW MODE OF THERAPY -- None of the
Company's  proposed  products has been approved for  commercial  sale or entered
Phase III clinical trials.  Even if the Company's proposed products appear to be
promising at an early stage of research or  development  such products may later
prove to be ineffective,  have adverse side effects,  fail to receive  necessary
regulatory approvals, be difficult or uneconomical to manufacture or market on a
commercial  scale,  may be precluded  from  development by new  regulations,  be
adversely affected by government price controls or limitations on reimbursement,
be precluded from commercialization by proprietary rights of third parties or be
subject  to  significant  competition  from  other  products.  There  can  be no
assurance that the Company will be able to  demonstrate,  as required,  that its
implants,  on a consistent basis and on a commercial scale,  among other things:
(i) successfully  isolate transplanted cells from the recipient's immune system;
(ii)  remain  biocompatible  with the  tissue  into  which  they are  implanted,
including,  for certain implants,  brain tissue;  (iii) adequately  maintain the
viability  of cells  contained  within  the  membrane;  (iv)  safely  permit the
therapeutic substances produced by the cells within the membrane to pass

                                       -6-






through the membrane into the patient in controlled doses for extended  periods;
and (v) are sufficiently durable for the intended indication.

GOVERNMENT  REGULATION -- The Company's  research,  preclinical  development and
clinical  trials,  as well as the  manufacturing  and marketing of its potential
products, are subject to extensive regulation by governmental authorities in the
United  States  and other  countries.  The  process of  obtaining  FDA and other
required regulatory approvals is lengthy,  expensive and uncertain. There can be
no assurance  that the Company or its  collaborators  will be able to obtain the
necessary  approvals to commence or continue  clinical testing or to manufacture
or market its  potential  products in  anticipated  time  frames,  if at all. In
addition,  several  legislative  proposals  have been made to reform the FDA. If
such  proposals  are  enacted  they may  result in  significant  changes  in the
regulatory  environment  the  Company  faces.  These  changes  could  result  in
different,  more costly or more  time-consuming  approval  requirements  for the
Company's  products,  in the dilution of FDA  resources  available to review the
Company's  products  or in other  unpredictable  consequences.  See  "Government
Regulation."

There  has  been  increasing   regulatory   concern  about  the  risks  of  cell
transplantation.  Concern  has focused on cells  derived  from cows (such as are
used in the Company's pain program) and cells from primates and pigs. The United
Kingdom has adopted a moratorium on xenotransplantation pending further research
and  discussion  and  the EC  Commission  has  introduced  a ban  on the  use of
"high-risk  material" from cattle and sheep in the Member States of the European
Union in the  manufacture  of  pharmaceuticals  (this ban would  apparently  not
include  cells used in the Company's  pain  program).  In addition,  the FDA has
recently proposed guidelines which impose significant constraints on the conduct
of  clinical  trials  utilizing  xenotransplantation.  Furthermore,  the FDA has
published  a "Proposed  Approach to  Regulation  of  Cellular  and  Tissue-Based
Products"  which  relates to use of human cells.  The Company  cannot  presently
determine  the  effects of such  actions  nor what other  actions  may be taken.
Restrictions on the testing or use of cells (whether nonhuman or human) as human
therapeutics could materially adversely affect the Company's product development
programs and the Company itself. See "Government Regulation."

DEPENDENCE  ON  OUTSIDE  PARTIES -- The  Company's  strategy  for the  research,
development,  commercialization  and marketing of its products contemplates that
the  Company  will enter into  various  arrangements  with  corporate  sponsors,
pharmaceutical companies, universities,  research groups and others. There is no
assurance   that  the  Company  will  be  able  to  enter  into  any  additional
arrangements on terms  acceptable to the Company,  or  successfully  perform its
obligations  under its existing or any  additional  arrangements.  If any of the
Company's  collaborators  fails to perform its obligations in a timely manner or
terminates its agreement with the Company,  the development or commercialization
of the Company's product candidate or research program under such  collaborative
agreement may be adversely affected.

NEED FOR AND UNCERTAINTY OF OBTAINING PATENT PROTECTION -- Patent protection for
products such as those the Company  proposes to develop is highly  uncertain and
involves complex factual and evolving legal questions. No assurance can be given
that any  patents  issued or licensed  to the  Company  will not be  challenged,
invalidated or circumvented,  or that the rights granted under such patents will
provide competitive advantages to the Company.

EXISTENCE OF THIRD PARTY PATENTS AND PROPRIETARY RIGHTS; NEED TO OBTAIN LICENSES
- -- A number of pharmaceutical,  biotechnology and other companies,  universities
and research  institutions  have filed patent  applications  or have been issued
patents  relating  to cell  therapy  and  encapsulation  and other  technologies
potentially  relevant to or required by the  Company's  expected  products.  The
Company cannot predict which, if any, of such applications will issue as patents
or the  claims  which  might be  allowed.  The  Company  is aware of a number of
third-party

                                       -7-






patent  applications and patents relating to cell  encapsulation or claiming use
of  genetically  modified  cells  to  treat  disease,  disorder  or  injury.  In
particular,  the Company is aware of a third-party  U.S. patent which relates to
the use of cells for  alleviating  chronic pain in humans and of two issued U.S.
patents  claiming  certain methods for treating  defective,  diseased or damaged
cells in the mammalian CNS by grafting  genetically  modified cells. The Company
cannot predict the effect of existing patent  applications and patents on future
unencapsulated  products.  In  addition,  the  Company  is aware of  third-party
patents and patent  applications  claiming  rights to the  neurotrophic  factors
(such as CNTF, NT 4/5,  Neurturin,  and CT-1) which the Company hopes to deliver
with its  technology,  and to the production of these factors through the use of
genetically  modified cells.  The Company  expects to use  genetically  modified
cells to produce these factors for use in its products.  The Company may also be
required to seek licenses in regard to other cell lines,  the techniques used in
creating or obtaining such cell lines,  the materials used in the manufacture of
its implants or  otherwise.  There can be no assurance  that the Company will be
able to establish collaborative arrangements or obtain licenses to the foregoing
technology or to other necessary or desirable technology on acceptable terms, if
at all,  or that the  patents  underlying  any such  licenses  will be valid and
enforceable. See "Patents, Proprietary Rights and Licenses."

SOURCES OF CELLS AND OTHER MATERIALS -- The Company's potential products require
genetically engineered cell lines or living cells harvested from animal or human
sources.  There can be no assurance that the Company will successfully  identify
or develop  sources of the cells required for its potential  products and obtain
such cells in quantities  sufficient to satisfy the commercial  requirements  of
its potential  products.  These supply limitations may apply, in particular,  to
primary cells which must be drawn directly from animal or human sources, such as
the bovine adrenal  chromaffin cells currently used in the Company's product for
the  treatment  of pain.  As an  alternative  to primary  cells,  the Company is
developing products based on the use of genetically altered cells.  Intellectual
property rights to important  genetic  constructs used in developing such cells,
including the constructs used to develop cells producing  neurotrophic  factors,
are or may be claimed by one or more companies,  which could prevent the Company
from using such cells.

MANUFACTURING  UNCERTAINTIES -- The Company's pilot  manufacturing plant may not
have  sufficient  capacity to permit the Company to produce all the products for
all of the clinical trials it anticipates  developing.  In addition, the Company
has not developed the capability to commercially manufacture any of its proposed
products  and is  unaware  of any  other  company  which  has  manufactured  any
membrane-encapsulated  cell  product  on a  commercial  scale.  There  can be no
assurance   that  the  Company  will  be  able  to  develop  the  capability  of
manufacturing  any of its  proposed  products at a cost,  consistency  or in the
quantities necessary to make a commercially viable product, if at all.

COMPETITION  --  Competitors  of the Company  are  numerous  and  include  major
pharmaceutical and chemical companies, biotechnology companies, universities and
other research institutions.  Currently, several of these competitors market and
sell therapeutic products for the treatment of chronic pain, Parkinson's disease
and other CNS conditions.  In addition,  most of the Company's  competitors have
substantially  greater  capital  resources,  experience in obtaining  regulatory
approvals and, in the case of commercial  entities,  experience in manufacturing
and  marketing  pharmaceutical  products,  than the  Company.  A number of other
companies are attempting to develop methods of delivering therapeutic substances
within or across the blood brain  barrier.  There can be no  assurance  that the
Company's  competitors will not succeed in developing  technologies and products
that are more effective than those being  developed by the Company or that would
render the Company's  technology and products  obsolete or  noncompetitive.  See
"Competition."


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DEPENDENCE ON KEY PERSONNEL -- The Company is highly  dependent on the principal
members of its  management  and  scientific  staff and  certain  of its  outside
consultants. Vacancies have occurred  and are likely to occur from time to time 
among the  Company's  senior management  and scientific  staff.  Loss of the 
services of any of the Company's key employees or consultants or the continued  
existence of such vacancies could have a material  adverse effect on the 
Company's  operations.  In addition,  the Company's  operations  are  dependent 
upon its  ability to  attract  and retain additional  qualified  scientific  and
management  personnel.  There  can be no assurance  the  Company  will be able 
to attract and retain  such  personnel  on acceptable terms given the 
competition among  pharmaceutical,  biotechnology and healthcare  companies,  
universities  and research  institutions for experienced personnel.

REIMBURSEMENT  AND  HEALTHCARE  REFORM -- In both domestic and foreign  markets,
sales  of the  Company's  potential  products  will  depend  in  part  upon  the
availability  and amounts of  reimbursement  from  third-party  healthcare payor
organizations,  including government  agencies,  private healthcare insurers and
other  healthcare   payors  such  as  health   maintenance   organizations   and
self-insured  employee plans. There is considerable  pressure to reduce the cost
of therapeutic  products.  There can be no assurance that  reimbursement will be
provided  by such  payors  at all or  without  substantial  delay,  or,  if such
reimbursement is provided,  that the approved reimbursement amounts will provide
sufficient  funds to enable the  Company to sell its  products  on a  profitable
basis. See "Reimbursement and Healthcare Cost Control."



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