Anatomy - Sigmoidectomy, laparoscopic - general and visceral surgery
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Descending and sigmoid colon
- Splenic flexure anchored to diaphragm via phrenocolic ligament
- Secondarily retroperitoneal location of descending colon
- Transition from descending to sigmoid colon within left iliac fossa
- Sigmoid located intraperitoneally (àsigmoid mesocolon)
- Transition from sigmoid to rectum anterior to second / third sacral vertebra
Blood supply
- Superior (medial colic artery) and inferior mesenteric artery (left colic artery) anastomose close to the splenic flexure(arc of Riolan)
- Arterial blood supply of the left hemicolon, sigmoid and upper rectum by the inferior mesenteric artery (left colic artery, sigmoid arteries with marginal artery of Drummond, superior rectal artery)
- Venous drainage into the portal system mirrors the arterial blood supply
Topography
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