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Primary small cell cancer of the bladder. Report of a case and review of literature.

We report a case of a primary small cell cancer of the bladder with characteristic cytological, histological, histochemical, and ultrastructural features. The patient refused radical surgery and the tumour was treated by external radiation and chemotherapy. The residual tumour was electroresected transurethrally. After 15 months' follow-up a recurrent tumour was resected, but metastases were not found. Aggressive surgery as well as early institution of radiotherapy or chemotherapy are needed because of the aggressive nature of the tumour.