[A case of locally advanced squamous cell carcinoma in bladder diverticulum successfully treated by bladder-preserving therapy].

: A 62-year-old man visited our hospital with asymptomatic gross hematuria. On cystoscopy, two diverticula were identified at the dome of the urinary bladder and one of them was packed with a tumor. Biopsy showed squamous cell carcinoma (SCC), G1, but malignancy was not detected in the rest of the vesical mucosa. We selected bladder-preserving therapy. Pathological diagnosis after partial cystectomy was SCC, G1 > G2, pT3b. Postoperatively, 3 courses of adjuvant chemotherapy with methotrexate, bleomycin and cisplatin were performed. The patient has remained free of recurrence for 4.5 years.