Which structure is left intact after an LAR procedure if possible?

• A. Anus
• B. Ureter
• C. Spleen
• D. Stomach

Answer: (A)

Low anterior resection aims to remove the diseased portion of the rectum while preserving the anal sphincter and anus to maintain continence. If feasible, keeping the anal canal and the sphincter muscles intact allows normal bowel function and avoids a permanent stoma. The other structures listed aren’t the targets of this preservation goal: the ureter is a separate structure not involved in maintaining continence after rectal surgery; the spleen and stomach are not part of the rectal surgical field or the continence mechanism. When preservation isn’t possible due to tumor extent, an abdominoperineal resection may be performed, resulting in a permanent stoma.