術前検査で筋層浸潤が疑われたがTURBTにより完全切除し得た巨大筋層非浸潤性膀胱癌の1例

Abstract

A 69-year-old man presented with gross hematuria. Cystoscopy revealed a large papillary tumor occupying the bladder. Magnetic resonance imaging showed a large bladder tumor more than 8cm in maximum diameter, suspected to be muscle-invasive disease. We performed the 1st transurethral resection of bladder tumor (TURBT) for the main purpose of pathological confirmation. Histopathological findings of the resected specimens showed urothelial carcinoma, low grade pTa. We performed subsequent treatments with TURBT twice, resulting in complete resection. The histopathological findings showed the same results as those of the 1st TURBT conclusively, which was consistent with non-muscle-invasive bladder cancer. He received intravesical instillation of pirarubicin eight times in total and has remained free from recurrence for more than 26 months after the final TURBT.