Cysts and diverticula arising from the gastro-intestinal tract constitute a group of congenital malformations which not only present problems in clinical diagnosis but are of pathologic interest on account of their origin. The problem is still in a controversial state, particularly from the standpoint of the origin of certain of these anomalies.
The typical Meckel's diverticulum is single and arises from the antimesenteric border of the ileum. It may lie free in the peritoneal cavity, attached only at its point of origin from the bowel, or may exist as a patulous duct or a fibrous cord connecting the intestinal tract with the umbilicus or as a blind sac or cord attached to adjacent structures in the abdomen. Besides this classic type of fetal remnant of the vitelline duct, cysts of enterogenous origin have been described on the same embryologic basis. These may occur in the region of the umbilicus, in