[Primary signet ring cell carcinoma of urinary bladder. A case report].

Primary signet ring cell carcinoma of urinary bladder is a rare tumor; accounting for approximately 0.24% of all bladder malignancies. In this study, we report a case of a 58-year old man who consulted for complaints of gross hematuria, the bladder biopsy showed signet ring cell carcinoma; the exploration of gastrointestinal tract did not reveal any other tumor localizations. A total cystoprostatectomy was performed followed by radiotherapy. The aim of this study is to determine the anatomoclinical, therapy and evolution characteristics of this rare tumor.