Quick Facts
Origin: A collection of veins located in the sigmoid mesocolon.
Course: Ascend in the sigmoid mesocolon to drain into the inferior mesenteric vein.
Tributaries: None.
Drainage: Sigmoid colon and mesocolon.
Origin
Multiple sigmoid veins form vasa recta within the sigmoid mesocolon.
Course
Sigmoid veins ascend intraperitoneally within the sigmoid mesocolon to drain into the inferior mesenteric vein.
Tributaries
The sigmoid veins are terminal veins. They form anastomoses with the sigmoid arteries.
Structures Drained
Sigmoid veins drain the distal part of the descending colon, the sigmoid colon, and sigmoid mesocolon.
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Vein
A venous sinus is a vein with a thin wall of endothelium that is devoid of smooth muscle to regulate its diameter.
