Kee YK, et al. - Given a higher risk of delayed acute kidney injury [acute kidney injury (AKI) development beyond the perioperative period] in patients undergoing colorectal surgery than that in patients undergoing other major operations, researchers examined the incidence of and risk factors for delayed AKI in 683 patients who underwent colorectal surgery with intestinal resection. AKI occurred in 177 (25.9 %) during the first postoperative year. AKI was noted commonly beyond the perioperative period. A higher risk of delayed AKI was observed in independent correlation with older age, lower preoperative serum albumin levels, and late ostomy closure. They suggest performing careful risk stratification and modification of risk factors for preventing delayed AKI in patients undergoing colorectal cancer surgery.