[A Case of Bladder Metastasis Occurring after Rectosigmoid Cancer Operation].

A 55-year-old man was admitted to our hospital for rectosigmoid(RS)cancer. We performed high anterior resection in the patient. Pathological findings showed mucinous adenocarcinoma, pT3(SS), pN1, sM0, sP0, pCy0, fStage III a. Two years and 3 months after the first operation, the patient visited our hospital due to lumbago, and we conducted a detailed abdominal examination. CT images showed the bladder tumor expanding into the vesical trigon and invading the prostate and mesorectum. Cystoscopy revealed the tumor, and tumor biopsy indicated poorly differentiated adenocarcinoma. These findings were consistent with metastasis of RS cancer; therefore, we performed total cystectomy, prostatectomy, and partial resection of the rectum. We performed a change of the ileum conduit to the urinary tract. Pathological findings showed many poorly differentiated adenocarcinomas in the lymph ducts ofthe bladder and prostate. Therefore, we diagnosed the condition as bladder cancer lymphogenous metastasis. The patient continues to do well without signs ofrecurrence 6 months later.