Citation, DOI & article data
The sigmoid colon is the continuation of the descending colon.
After the distal descending colon has curved medially it enters the pelvis, where it gains a mesentery and is then called the sigmoid colon. It measures approximately 15 cm in length.
The sigmoid colon continues as the rectum when it loses its mesentery, at approximately S3 level.
- superiorly: loops of small intestine
- posteriorly: left internal iliac artery and vein, left ureter, piriformis muscle, sacrum, sacral plexus
- similarly named veins drain into the inferior mesenteric vein
Lymphatics travel with vessels to the inferior mesenteric group.
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