[A Case of Synchronous Primary Cancers of the Rectum and Bladder].

A 74-year-old male was referred to our Department of Urology with a chief complaint of gross hematuria. Pelvic MRI revealed a protruding lesion within the bladder and a mural thickening of the anterior wall of the lower rectum. Based on these findings and the subsequent diagnostic workup, the patient was diagnosed with advanced rectal cancer and muscle- invasive bladder cancer. The patient underwent robotic-assisted total pelvic exenteration, right lateral lymph node dissection, and ileal conduit diversion. The postoperative course was uneventful, and the patient was discharged in an optimal general condition on postoperative day 31. Histopathological examination confirmed metastasis of the rectal cancer to the right lateral lymph node. Six months after surgery, the patient underwent adjuvant chemotherapy.