Etymology: L, ileum + Gk, kolon, colon; L, nodus, knot
a node in one of three groups of superior mesenteric lymph glands, forming a chain of approximately 15 nodes around the ileocolic (mesenteric) artery. They tend to form in two main groups, one near the duodenum, the other on the lower part of the ileocolic artery. The chain breaks into several groups where the artery divides into its terminal branches. The ileocolic nodes receive materials from the jejunum, ileum, cecum, vermiform appendix, ascending colon, and transverse colon. Their efferent vessels pass to the preaortic nodes. Compare mesenteric node, mesocolic node.