URMC / Pathology & Laboratory Medicine / Read Our Blog / October 2016 October 2016 Chang Receives Patent for Prostate Cancer Treatment Method This month, Chawnshang Chang, Ph.D. received a U.S. patent for a new way to treat prostate cancer. His methods aim to both treat prostate cancer patients and keep it from coming back. In his description Chang notes that patients who are treated with the commonly used method of androgen deprivation therapy (ADT) often experience a return, even after remission.