Abstract
We report the cases of four patients presenting with small cell carcinoma of the urinary bladder, which were diagnosed at our hospital between 2010 and 2011, whose clinicopathologies were reviewed. The patients included 3 men and one woman ranging in age from 58 to 87 years (median age: 75.5 years). All the patients complained of macroscopic hematuria. One risk factor is smoking which was observed in one patient. Cystoscopy revealed a papillary bladder tumor, but computed tomography (CT) examination revealed a sessile bladder tumor in our patients. Histologically, all the patients presented with small cell carcinoma and 3 patients exhibited other carcinoma components such as urothelial carcinoma. Three patients had Stage pT2, and one patient had Stage pT1. Follow-up data available for 3 patients revealed a poor outcome at 5 months and 4 months. Small cell carcinoma of the urinary bladder has poor prognosis, and it is important for diagnosis to be based on tumor morphology, as determined by endoscopic findings and CT examination, and on cytology with small cell carcinoma in mind.
