[Informed consent for colorectal cancer surgery].

There are two issues in informed consent for colorectal cancer surgery. One is the actual surgical technique. Recently intersphincteric resection (ISR) has been performed to avoid permanent colostomy, although it is not standard procedure. Regarding QOL score, Patients with colostomies do not necessarily have lower quality of life scores than patients who undergo sphincter-preserving surgery because of frequent bowel movements. Lateral lymphadenectomy for lower rectal cancer was standard procedure; however, its indications became limited due to urinary and sexual dysfunction. Preoperative radiotherapy is considered instead of lateral lymphadenectomy, as in the Western concept of the local recurrence of rectal cancer. Now laparoscopic surgery is accepted for stage I colon cancer according to the guidelines of the Japan Society for Cancer of the Colon and Rectum. The other issue is postoperative complications like anastomotic leakage, intestinal obstruction, etc. Frequent bowel movements and urinary and sexual dysfunction should also be explained before rectal cancer surgery.