[Signet-ring cell neoplasm. Unusual histologic variety as primary bladder tumor].
We report a case of primary signet-ring cell adenocarcinoma of the urinary bladder. It is a extremely rare tumor. Gross hematuria is the commonest clinical presentation as well as this case. Our patient presented with advanced tumour invasion into perivesical fat at dome. The treatment was partial cystectomy together with quimiotherapy. Medical literature are reviewed with special remark on histopathology and its bladder origin.