POWER OF ATTORNEY


        Know all these presents, that Diane C. Young hereby
constitutes and appoints each of Marc S. Hanover, Henry P.
Doggrell and Jason T. Shackelford, signing singly, the
undersigned's true and lawful attorney-in-fact to:

            (1)  execute for and on behalf of the undersigned, in
the undersigned's capacity as an officer and/or director of GTx,
Inc. (the "Company"), Forms 3, 4, and 5 in accordance with
Section 16(a) of the Securities and Exchange Act of 1934 and the
rules thereunder;

            (2)  do and perform any and all acts for and on
behalf of the undersigned which may be necessary or desirable to
complete and execute any such Form 3, 4, or 5, complete and
execute any amendment or amendments thereto, and timely file such
form with the United States Securities and Exchange Commission
and any stock exchange or similar authority; and

            (3)  take any other action of any type whatsoever in
connection with the foregoing which, in the opinion of such
attorney-in-fact, may be the benefit to, in the best interest of,
or legally required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such
form and shall contain such terms and conditions as such
attorney-in-fact may approve in such attorney-in-fact's
discretion.

        The undersigned hereby grants to each such attorney-in-
fact full power and authority to do and perform any and every act
and thing whatsoever requisite, necessary, or proper to be done
in the exercise of any of the rights and powers herein granted,
as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution
or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or
substitutes, shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing attorneys-in-
fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any
of the undersigned's responsibilities to comply with Section 16
of the Securities Exchange Act of 1934.

        This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to file Forms
3, 4, and 5 with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier
revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power
of Attorney to be executed as of this 13th day of July, 2015.



/s/ Diane C. Young
Signature