Primary bladder angiosarcomas are extremely rare but aggressive tumors. Due to the small number of cases (less than 30) reported to date, the information about natural tumor progression, optimal treatment procedure and prognosis are limited. Also, published reports of bladder angiosarcoma have not adequately featured imaging findings. Herein we report computed tomography and magnetic resonance imaging findings of a 20-year-old male with primary angiosarcoma of the bladder. (C) 2014 Elsevier Inc. All rights reserved.