[Primary malignant lymphoma of the urinary bladder: a case report].

We report a case of primary malignant lymphoma of the urinary bladder. A 72-year old woman complaining of low abdominal pain was admitted to the Tone Central Hospital in February, 2001. Macrohematuria appeared, and the submucosal tumor was observed by cystoscopy, and A Transurethral bladder biopsy led to a histopathological diagnosis of non-Hodgkin's malignant lymphoma (diffuse lymphoma, large-sized cell type, B-cell type). Clinical stage was IE, but as soon, she was get bilateral hydronephrosis and bladder-ileum fistula. The administration of 6-course CHOP chemotherapy had an excellent effect of disappearing the tumor, bilateral hydronephrosis, and bladder-ileum fistula. She remained free of disease until now.