Medical Definition of mesenteric ganglion
: either of two ganglionic masses of the sympathetic nervous system associated with the corresponding mesenteric plexus:a: a variable amount of massed ganglionic tissue of the inferior mesenteric plexus near the origin of the inferior mesenteric artery—called also inferior mesenteric ganglionb: a usually discrete ganglionic mass of the superior mesenteric plexus near the origin of the superior mesenteric artery—called also superior mesenteric ganglion
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