In course of laparotomy a surgeon revealed gangrenous lesion of descending colon. It was caused by thrombosis of the following artery:

Answer options

1. Ileocolic
2. Dexter colic
3. Median colic
4. Sinister colic
5. Superior mesenteric artery

Explanation

The left colic artery is a branch of the inferior mesenteric artery that runs to the left behind the peritoneum and in front of the psoas major muscle, and after a short, but variable, course divides into an ascending and a descending branch. The left colic artery (sinister colic) ascends leftwards to supply the descending colon and hence its thrombosis can lead to a gangrenous lesion of the descending colon.