MEMPHIS, Tenn.--(BUSINESS WIRE)--GTx, Inc. (NASDAQ: GTXI) today announced the appointment of Diane C. Young, M.D., as Vice President, Chief Medical Officer. Dr. Young is a board-certified medical oncologist with 25 years of industry clinical development experience, most recently with Novartis where she spent 12 years in global and regional leadership roles in oncology clinical development and medical affairs.