[Small cell carcinoma of the urinary bladder: a case report]

A 64-year-old man presented with asymptomatic gross hematuria. Cystoscopy revealed a non-papillary broad-based tumor on the posterior wall of the bladder. He had no evidence of metastases. Urine cytology showed a cluster of molded tumor cells with naked hyperchromatic nuclei, which indicated small cell carcinoma. He received preoperative irradiation to the bladder and underwent partial cystectomy. Pathological examination of the specimen showed small cell carcinoma at the stage of pT2. Two years after the operation, he had no evidence of recurrence.