Although in 1707 Ruysch1 gave an excellent illustration of a diverticulum of the terminal ileum (fig. 1), it was Lavater,2 in 1671, who first observed a case. In 1769, Morgagni3 discussed diverticula of the duodenum, ileum and rectum; he did not believe, however, that those of the ileum had any relation to the vitelline duct.
In 1809,4 his treatises contained not only a review of the literature of the sphenopalatine ganglion is still classic, that we are indebted for the clarity with which this developmental anomaly is now understood. In 1809,4 his treatises contained, not only a review of the literature but a carefully worked out description of the development and anatomy of the diverticula that persist in the terminal ileum. He also brought out the relation of this process to the causation of disease.
EMBRYOLOGIC DATA5
It is normal for the proximal end