Leiomyosarcoma of the urinary bladder presenting as life threatening gross hematuria.

Leiomyosarcomas are a relatively rare tumor entity encountered within the urinary bladder. There are just over 100 cases reported in the medical literature. Herein, we describe a case of leiomyosarcoma presenting initially as a urinary tract infection with lower abdominal pain. A life threatening episode of gross hematuria guided to the final diagnosis and treatment. Due to the rarity of this malignancy, we present this case including a review of the existing literature relative to the diagnosis and treatment.