A small mass of chromaffin cells derived from neural crest, located near sympathetic ganglia along the abdominal aorta, and serves in homeostatic regulation of blood pressure and in secretion of catecholamines into the fetal circulation during the early gestational period.
This organ regresses in the late third trimester and following birth, and form the aorticosympathetic group of the adult paraganglia.
Word origin: first described by Emil Zuckerkandl, a professor of anatomy at the University of Vienna, in 1901.
Synonym: paraaortic body.
Compare: aortic body.
See also: chromaffin cell.