UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13G/A
                                (Amendment No. 5)

                    Under the Securities Exchange Act of 1934

                              Neoprobe Corporation
                              --------------------

                      Common Stock, no par value per share
                      ------------------------------------
                         (Title of Class of Securities)

                                    640518106
                                    ---------
                                  CUSIP Number

                                December 31, 2003
                                -----------------
                      (Date of Event which Requires Filing
                               of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                |_| Rule 13d-1(b)
                                |X| Rule 13d-1(c)
                                |_| Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

                          Continued on following pages
                               Page 1 of 11 Pages
                             Exhibit Index: Page 10



                                  SCHEDULE 13G

CUSIP No. 640518106                                                 Page 2 of 11
--------------------------------------------------------------------------------
1     Names of Reporting Persons
      I.R.S. Identification Nos. of above persons (entities only)

            PARAMOUNT CAPITAL ASSET MANAGEMENT, INC.
--------------------------------------------------------------------------------
2     Check the Appropriate Box If a Member of a Group *
                                                                          a. |_|
                                                                          b. |X|
--------------------------------------------------------------------------------
3     SEC Use Only

--------------------------------------------------------------------------------
4     Citizenship or Place of Organization

            DELAWARE
--------------------------------------------------------------------------------

                  5     Sole Voting Power
 Number of              0
  Shares          --------------------------------------------------------------
Beneficially      6     Shared Voting Power
  Owned By              1,000,000
   Each           --------------------------------------------------------------
Reporting         7     Sole Dispositive Power
  Person                0
   With           --------------------------------------------------------------
                  8     Shared Dispositive Power
                        1,000,000
--------------------------------------------------------------------------------
9     Aggregate Amount Beneficially Owned by Each Reporting Person

            1,000,000
--------------------------------------------------------------------------------
10    Check Box If the Aggregate Amount in Row (9) Excludes Certain
      Shares *
      |_|
--------------------------------------------------------------------------------
11    Percent of Class Represented By Amount in Row (9)

      2.28%
--------------------------------------------------------------------------------
12    Type of Reporting Person *

      CO
--------------------------------------------------------------------------------

* see instructions before filling out



CUSIP No. 640518106                                                 Page 3 of 11
--------------------------------------------------------------------------------
1     Names of Reporting Persons
      I.R.S. Identification Nos. of above persons (entities only)

            ARIES SELECT, LTD.
--------------------------------------------------------------------------------
2     Check the Appropriate Box If a Member of a Group *
                                                                          a. |_|
                                                                          b. |X|
--------------------------------------------------------------------------------
3     SEC Use Only

--------------------------------------------------------------------------------
4     Citizenship or Place of Organization

            CAYMAN ISLANDS
--------------------------------------------------------------------------------
                  5     Sole Voting Power
 Number of              0
  Shares          --------------------------------------------------------------
Beneficially      6     Shared Voting Power
  Owned By              702,200
   Each           --------------------------------------------------------------
Reporting         7     Sole Dispositive Power
  Person                0
   With           --------------------------------------------------------------
                  8     Shared Dispositive Power
                        702,200
--------------------------------------------------------------------------------
9     Aggregate Amount Beneficially Owned by Each Reporting Person

      702,200
--------------------------------------------------------------------------------
10    Check Box If the Aggregate Amount in Row (9) Excludes Certain
      Shares *

      |_|
--------------------------------------------------------------------------------
11    Percent of Class Represented By Amount in Row (9)

      1.60%
--------------------------------------------------------------------------------
12    Type of Reporting Person *

      CO
--------------------------------------------------------------------------------

* see instructions before filling out



CUSIP No. 640518106                                                 Page 4 of 11
--------------------------------------------------------------------------------
1     Names of Reporting Persons
      I.R.S. Identification Nos. of above persons (entities only)

            LINDSAY A. ROSENWALD, M.D.
--------------------------------------------------------------------------------
2     Check the Appropriate Box If a Member of a Group *

                                                                          a. |_|
                                                                          b. |X|
--------------------------------------------------------------------------------
3        SEC Use Only

--------------------------------------------------------------------------------
4     Citizenship or Place of Organization

            UNITED STATES
--------------------------------------------------------------------------------
                  5     Sole Voting Power
 Number of              0
  Shares          --------------------------------------------------------------
Beneficially      6     Shared Voting Power
 Owned By               1,000,000
   Each           --------------------------------------------------------------
Reporting         7     Sole Dispositive Power
  Person                0
   With           --------------------------------------------------------------
                  8     Shared Dispositive Power
                        1,000,000
--------------------------------------------------------------------------------
9     Aggregate Amount Beneficially Owned by Each Reporting Person

      1,000,000
--------------------------------------------------------------------------------
10    Check Box If the Aggregate Amount in Row (9) Excludes Certain
      Shares *

      |_|
--------------------------------------------------------------------------------
11    Percent of Class Represented By Amount in Row (9)

      2.28%
--------------------------------------------------------------------------------
12    Type of Reporting Person *

      IN
--------------------------------------------------------------------------------
* see instructions before filling out



CUSIP No. 640518106                                                 Page 5 of 11
--------------------------------------------------------------------------------
1     Names of Reporting Persons
      I.R.S. Identification Nos. of above persons (entities only)

            ARIES SELECT I LLC
--------------------------------------------------------------------------------
2     Check the Appropriate Box If a Member of a Group *

                                                                          a. |_|
                                                                          b. [x]
--------------------------------------------------------------------------------
3     SEC Use Only

--------------------------------------------------------------------------------
4     Citizenship or Place of Organization

            DELAWARE
--------------------------------------------------------------------------------
                  5     Sole Voting Power
 Number of              0
  Shares          --------------------------------------------------------------
Beneficially      6     Shared Voting Power
 Owned By               297,800
  Each            --------------------------------------------------------------
Reporting         7     Sole Dispositive Power
 Person                 0
  With            --------------------------------------------------------------
                  8     Shared Dispositive Power
                        297,800
--------------------------------------------------------------------------------
9     Aggregate Amount Beneficially Owned by Each Reporting Person

      297,800
--------------------------------------------------------------------------------
10    Check Box If the Aggregate Amount in Row (9) Excludes Certain
      Shares *

      |_|
--------------------------------------------------------------------------------
11    Percent of Class Represented By Amount in Row (9)

      0.68%
--------------------------------------------------------------------------------
12    Type of Reporting Person *

      CO
--------------------------------------------------------------------------------
* see instructions before filling out



CUSIP No. 640518106                                                 Page 6 of 11

Item 1(a) Name of Issuer:

      Neprobe Corporation. (the "Issuer")

Item 1(b) Address of the Issuer's Principal Executive Offices:

      117 Fourth Avenue, Needham, MA 02494

Item 2(a) Name of Person Filing:

This statement is filed on behalf of Paramount Capital Asset Management, Inc.
("Paramount Capital"), Aries Select, Ltd. ("Aries Select"), Aries Select I LLC
("Aries I") and Lindsay A. Rosenwald, M.D. ("Dr. Rosenwald" and collectively,
the "Reporting Persons").

Dr. Rosenwald is an investment banker, venture capitalist, fund manager and sole
stockholder and chairman of Paramount Capital. Paramount Capital is the managing
member to Aries I and the investment manager to Aries Select.

Item 2(b) Address of Principal Business Office or, if None, Residence:

The address of the principal business office of Paramount Capital, Aries I and
Dr. Rosenwald is 787 Seventh Avenue, 48th Floor, New York, New York, 10019. The
address of the principal business office of Aries Select is c/o Fortis Fund
Services Cayman Limited, Grand Pavilion Commercial Center, 802 West Bay Road,
Grand Cayman, Cayman Islands.

Item 2(c) Citizenship:

      1)    Paramount Capital is a Subchapter S corporation incorporated in
            Delaware;

      2)    Aries Select is a Cayman Islands exempted company;

      3)    Aries I is a Delaware limited liability company;

      4)    Dr. Rosenwald is a citizen of the United States.

Item 2(d) Title of Class of Securities:

      Common Stock (the "Shares").

Item 2(e) CUSIP Number:

      640518106

Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b) or
        (c), check whether the person filing is a:

      This Item 3 is not applicable.



CUSIP No. 640518106                                                 Page 7 of 11

Item 4. Ownership:

Item 4(a) Amount Beneficially Owned:

Each of the Reporting Persons may be deemed the beneficial owner of the
following number of Shares:

      (i)   Paramount Capital may be deemed to own 1,000,000 Shares, which
            includes the Shares owned by Aries Select and Aries I.

      (ii)  Aries Select may be deemed the beneficial owner of 702,200 Shares

      (iii) Aries I may be deemed the beneficial owner of 297,800 Shares

      (iv)  Dr. Rosenwald may be deemed the beneficial owner of all Shares
            beneficially owned by Paramount Capital.

Item 4(b) Percent of Class:

      Please see Item 11 of each cover page.Item 4(c) Number of shares as to
which such person has:


                                                                   
      (i)   Sole power to vote or direct the vote:                    Please see Item 5 of each cover page

      (ii)  Shared power to vote or to direct the vote                Please see Item 6 of each cover page

      (iii) Sole power to dispose or to direct the disposition of     Please see Item 7 of each cover page

      (iv)  Shared power to dispose or to direct the disposition of   Please see Item 8 of each cover page


Item 5. Ownership of Five Percent or Less of a Class:

      If this statement is being filed to report the fact that as of the date
      hereof the reporting person have ceased to be the beneficial owners of
      more than five percent of the class of securities, check the following |X|

Item 6. Ownership of More than Five Percent on Behalf of Another Person:

      Not applicable

Item 7. Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on by the Parent Holding Company:

      This Item 7 is not applicable.

Item 8. Identification and Classification of Members of the Group:

      This Item 8 is not applicable.

Item 9. Notice of Dissolution of Group:

      This Item 9 is not applicable.



CUSIP No. 640518106                                                 Page 8 of 11

Item 10. Certification:

      By signing below each of the Reporting Persons certifies that, to the best
of such person's knowledge and belief, the securities referred to above were not
acquired and are not held for the purpose of or with the effect of changing or
influencing the control of the Issuer of the securities and were not acquired
and are not held in connection with or as a participant in any transaction
having such purpose or effect.



                                                                    Page 9 of 11

                                   SIGNATURES

      After reasonable inquiry and to the best of my knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct, as of this February 2, 2004.

LINDSAY A. ROSENWALD, M.D.              PARAMOUNT CAPITAL ASSET MANAGEMENT, INC.

By /s/ Lindsay A. Rosenwald             By: Lindsay A. Rosenwald
  ---------------------------------        -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT, LTD.

                                        By:  Paramount Capital Asset
                                               Management, Inc.
                                        Its: Investment Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT I LLC

                                        By: Paramount Capital Asset
                                              Management, Inc.
                                            Its Managing Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT II LLC

                                        By: Paramount Capital Asset
                                              Management, Inc.
                                            Its Managing Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman



                                                                   Page 10 of 11

                                  EXHIBIT INDEX

                                                                        Page No.
                                                                        --------

A.    Joint Filing Agreement, dated as of February 2, 2004, by
      and among Paramount Capital Asset Management, Inc., Aries
      Select, Ltd., Aries Select I LLC, Aries Select II, LLC, and
      Lindsay A. Rosenwald, M.D...................................            11



                                                                   Page 10 of 11

                                    EXHIBIT A

                             JOINT FILING AGREEMENT

      The undersigned hereby agree that the statement on Schedule 13G with
respect to the Common Stock of Neoprobe Corporation dated as of February 2,
2004, is, and any amendments thereto (including amendments on Schedule 13D)
signed by each of the undersigned shall be, filed on behalf of each of us
pursuant to and in accordance with the provisions of Rule 13d-1(k) under the
Securities Exchange Act of 1934.

LINDSAY A. ROSENWALD, M.D.              PARAMOUNT CAPITAL ASSET MANAGEMENT, INC.

By Lindsay A. Rosenwald                 By: Lindsay A. Rosenwald
  ---------------------------------        -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT, LTD.

                                        By:  Paramount Capital Asset
                                               Management, Inc.
                                        Its: Investment Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT I LLC

                                        By: Paramount Capital Asset
                                              Management, Inc.
                                            Its Managing Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman


                                        ARIES SELECT II LLC

                                        By: Paramount Capital Asset
                                              Management, Inc.
                                            Its Managing Manager

                                        By: Lindsay A. Rosenwald
                                           -------------------------------------
                                        Name:  Lindsay A. Rosenwald, M.D.
                                        Title: Chairman