The inferior mesenteric lymph nodes consist of:
- (a) small glands on the branches of the left colic and sigmoid arteries
- (b) a group in the sigmoid mesocolon, around the superior hemorrhoidal artery
- (c) a pararectal group in contact with the muscular coat of the rectum
| Inferior mesenteric lymph nodes | |
|---|---|
 Lymphatics of colon. (Inferior mesenteric labeled at bottom center.) | |
 | |
| Details | |
| System | Lymphatic system |
| Drains to | Preaortic lymph node |
| Identifiers | |
| Latin | nodi lymphoidei mesenterici inferiores |
| Anatomical terminology | |
Structure
The inferior mesenteric lymph nodes are lymph nodes present throughout the hindgut.[1]
Afferents
The inferior mesenteric lymph nodes drain structures related to the hindgut;[1] they receive lymph from the descending colon, sigmoid colon, and proximal part of the rectum.[2]
Efferents
They drain into the superior mesenteric lymph nodes and ultimately to the preaortic lymph nodes.[1] Lymph nodes surrounding the inferior mesenteric artery drain directly into the preaortic nodes.[1]
Clinical significance
Colorectal cancer may metastasise to the inferior mesenteric lymph nodes. For this reason, the inferior mesenteric artery may be removed in people with lymph node-positive cancer.[3] This has been proposed since at least 1908, by surgeon William Ernest Miles.[4]
Additional images
Regional lymph tissue
Lymph nodes of the large intestine and lower abdomen
References
This article incorporates text in the public domain from page 710 of the 20th edition of Gray's Anatomy (1918)
