Inferior mesenteric vein

The inferior mesenteric vein drains blood from the distal portion of the colon as well as the rectum (i.e. the hindgut). 

Gross anatomy

Origin and course

The inferior mesenteric vein drains the mesenteric arcade of the hindgut (which comprises distal transverse colon, descending colon, sigmoid colon). Specifically, it drains the tributaries of sigmoid veins, middle and left colic veins, as well as the superior, middle and inferior rectal veins. The rectal vein and sigmoid vein usually join to form a common trunk before uniting with the left colic vein.

Supply

The inferior mesenteric vein usually drains into the splenic vein; however, anatomical variants where it drains to the superior mesenteric vein or at the splenoportal angle are not uncommon.

Relations

The inferior mesenteric vein lies left of the inferior mesenteric artery and anterior to the left psoas major muscle, close to the Treitz ligament. It can cross the left testicular artery or ascend medially to it.

Abdominal and pelvic anatomy
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Article information

rID: 47212
Section: Anatomy
Tag: refs
Synonyms or Alternate Spellings:

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