Rexahn Pharmaceuticals, Inc. (NYSE American:RNN), a clinical stage biopharmaceutical company developing innovative, targeted therapeutics for the treatment of cancer, announced that updated safety and efficacy data from the ongoing Phase 2a clinical trial of RX-3117 in advanced urothelial (bladder) cancer were presented at the American Society of Clinical Oncology Genitourinary Cancers (ASCO GU) 2018 Annual Meeting on February 9, 2018.