Organ
Mesenteric lymph nodes
Immune surveillance along intestinal vessels
High-yield
Follow the supplying artery to understand most intestinal nodal routes. The small bowel reaches the superior mesenteric group after passing through peripheral mesenteric nodes.
Overview
Intestinal lymph passes from vessels in the bowel wall into nodes within its mesentery. Small-bowel nodes form successive groups near the intestine, among the vascular arcades, and toward the mesenteric root. Colonic drainage follows the corresponding colic vessels through its own regional chains.
Reference facts
- Location
- Within small-bowel mesentery and the connective tissue accompanying colonic vessels.
- Parts
- Small-bowel groups lie near the bowel, along arterial arcades, and centrally; ileocolic nodes receive the terminal ileum, cecum and appendix.
- Drains from
- Receive lymph from intestinal territories associated with the vessels they accompany.
- Venous/Lymphatic drainage
- Central drainage reaches superior or inferior mesenteric nodes; onward routes connect with intestinal and lumbar lymphatic trunks.
- Function
- Bring intestinal antigens to immune cells. They receive chyle after dietary lipid has entered intestinal lacteals.
Clinical correlation
Inflamed mesenteric nodes can accompany infection and cause abdominal pain, particularly in children. Right lower abdominal pain can resemble appendicitis; node enlargement alone does not establish which condition is responsible.
Frequently asked questions
Where are the mesenteric lymph nodes located?
Within small-bowel mesentery and the connective tissue accompanying colonic vessels.
What do the mesenteric lymph nodes do?
Bring intestinal antigens to immune cells. They receive chyle after dietary lipid has entered intestinal lacteals.
What are the parts of the mesenteric lymph nodes?
Small-bowel groups lie near the bowel, along arterial arcades, and centrally; ileocolic nodes receive the terminal ileum, cecum and appendix.
How do the mesenteric lymph nodes drain?
Central drainage reaches superior or inferior mesenteric nodes; onward routes connect with intestinal and lumbar lymphatic trunks.