[Anatomy and topography of the lymphatic vessels and regional lymph nodes of the rectum in newborn infants and children to 3 years of age].
In 30 corpses of newborns and children up to 3 years of age, by means of the intratissue and direct injection of the modified Gerota's mass, certain increase in number and size of the superficial inguinal lymph vessels belonging to the superior-medial group, as well as the pararectal and superior rectal lymph nodes has been noted. The diameter of both afferent and efferent lymphatic vessels in the nodes mentioned in children of 1-3 years of age is greater than in the newborns. The number of the afferent vessels running towards these nodes in most cases, regardless the age, prevail over the efferent ones, and the diameter of the latter is greater than in the afferent vessels. The pararectal lymph nodes in 80% of cases are the nodes of the first step for the lymph flowing from the rectum, in 15% - the nodes of the first and second steps, simultaneously, and in 5% - of the third and fourth steps. The superior pararectal lymph nodes in 80% of cases are the nodes of the third and fourth steps, and in 20% of cases - those of the first and second steps for the lymph flowing from the rectum.
D000375:Aging; D001003:Anal Canal / Q000033:anatomy & histology; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008198:Lymph Nodes / Q000033:anatomy & histology*; D008208:Lymphatic System / Q000033:anatomy & histology*; D008297:Male; D012007:Rectum / Q000033:anatomy & histology*
Anatomiia i topografiia limfaticheskikh sosudov i regionarnykh limfaticheskikh uzlov priamoĭ kishki u novorozhdennykh i deteĭ do 3 let zhizni.