THE LYMPHATIC VESSELS OF ABDOMEN AND PELVIS 



709 





The superior mesenteric glands may be divided into three principal groups: 

 mesenteric, ileocolic, and mesocolic. 



The Mesenteric Glands (lymphoglandulce mesentericce) lie between the layers of 

 the mesentery. They vary from one hundred to one hundred and fifty in number, 

 and may be grouped into three sets, viz. : one lying close to the wall of the small 

 intestine, among the terminal twigs of the superior mesenteric artery; a second, 

 in relation to the loops and primary branches of the vessels; and a third along 

 the trunk of the artery. 



The Ileocolic glands (Figs. 615, 616), from ten to twenty in number, form a chain 

 around the ileocolic artery, but show a tendency to subdivision into two groups, 

 one near the duodenum and another on the lower part of the trunk of the artery. 



Fia. 617. Lymphatics of colon. (Jamieson and Dobaon.") 



Where the vessel divides into its terminal branches the chain is broken up into sev- 

 eral groups, viz.: (a) ileal, in relation to the ileal branch of the artery; (6) 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 vermiform process; 

 (e) right colic, along the medial side of the ascending colon. 



The Mesocolic Glands (lymphoglandulce mesocolicae) 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. 





