[Three Cases of Sigmoid Colon Cancer with Bladder Invasion That Were Treated with Neoadjuvant Chemotherapy, Allowing Radical Resection and Bladder Preservation].

Three patients with locally advanced sigmoid colon cancer with bladder invasion underwent 8 courses of neoadjuvant chemotherapy to achieve complete resection and bladder preservation. All 3 patients showed tumor shrinkage on abdominal contrast CT, and laparoscopic sigmoid colon resection and partial bladder resection were performed. The therapeutic effects were Grade 3 in 2 cases and Grade 2 in 1 case. All 3 patients received 4 courses of postoperative adjuvant chemotherapy, and none of them had recurrence.