[Bladder-Sparing Surgery with Preoperative Chemotherapy for Rectal Cancer with Urinary Bladder Involvement-A Case Report].

: A 65-year-old male was diagnosed with rectal cancer invading the urinary bladder, swollen para-aorticlymph nodes, and multiple liver metastases in abdominal CT. After 8 courses of mFOLFOX6 plus panitumumab, the rectal cancer, para-aortic lymph nodes metastasis, and liver metastases decreased significantly in size. Rectal cancer and liver metastases were considered resectable, hence low anterior resection of the rectum was performed. Intraoperative frozen section analysis showed negative metastaticinvolvement of the para-aorticlymph nodes and surgical margins of the urinary bladder; therefore, the urinary bladder was completely preserved. Partial resection of the liver was performed 2 months later. In conclusion, the patient showed good surgical and quality of life results. Thus, the bladder-sparing strategy with preoperative chemotherapy could be considered for appropriately selected rectal cancer patients with urinary bladder involvement.