Analysis of diverting ileostomy for colorectal cancer surgery: stenosis and T4 invasion are risk factors of reoperation due to anastomotic leakage, even when ileostomy is performed

Lower rectal tumors are associated with a high risk of AL, and diverting ileostomy should be considered in such cases. Due to small number of AL patients requiring reoperation, the finding is exploratory. However, in patients with stenosis and T4 invasion, the merits of ileostomy might be restricted.