From Wikipedia, the free encyclopedia
The
superior mesenteric lymph nodes
may be divided into three principal groups:
- mesenteric lymph nodes
- ileocolic lymph nodes
- mesocolic lymph nodes
Structure
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Mesenteric lymph nodes
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The
mesenteric lymph nodes
or
mesenteric glands
are one of the three principal groups of superior mesenteric lymph nodes and lie between the layers of the
mesentery
.
They number from one hundred to one hundred and fifty, and are sited as two main groups:
Ileocolic lymph nodes
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The
ileocolic lymph nodes
, from ten to twenty in number, form a chain around the
ileocolic artery
, but tend to subdivide into two groups, one near the
duodenum
and the other on the lower part of the trunk of the artery. Where the vessel divides into its terminal branches the chain is broken up into several groups:
- (a) ileal, in relation to the
ileal branch
of the artery;
- (b) anterior ileocolic, usually of three glands, in the ileocolic fold, near the wall of the
cecum
;
- (c) posterior ileocolic, mostly placed in the angle between the
ileum
and the
colon
, but partly lying behind the cecum at its junction with the ascending colon;
- (d) a single gland, between the layers of the mesenteriole of the
appendix
;
- (e) right colic, along the medial side of the
ascending colon
.
Mesocolic lymph nodes
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The
mesocolic lymph nodes
are numerous, and lie between the layers of the
transverse mesocolon
, in close relation to the transverse colon; they are best developed in the neighborhood of the right and left
colic flexures
.
One or two small glands are occasionally seen along the trunk of the
right colic artery
and others are found in relation to the trunk and branches of the
middle colic artery
.
Function
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The superior mesenteric glands receive lymph from the
jejunum
,
ileum
,
cecum
,
vermiform process
, and the ascending and transverse parts of the colon; lymph drains into the
preaortic glands
.
Additional images
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References
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This article incorporates text in the
public domain
from
page 709
of the 20th edition of
Gray's Anatomy
(1918)
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