1131PMedical costs and health care resource use (HCRU) in elderly us patients (pts) with newly diagnosed metastatic or surgically unresectable urothelial carcinoma (mUC) using surveillance, epidemiology, and end results (SEER) medicare data. (18th September 2017) - Aly, A.; Johnson, C.; Yang, S.; Rao, S.; Botteman, M.; Hussain, A.