ABSTRACT
The omphalomesenteric duct is a long narrow tube that joins
the yolk sac to the digestive tube in the human embryo.
Normally, the duct undergoes complete obliteration during
the 7th week. Incomplete obliteration results in omphalome-
senteric remnants, which may be apparent in the newborn
Development of the midgut in the embryo is characterized by
elongation of the gut at the end of the 4th week of gestation.
At the apex, the intestinal loop remains connected and open
to the yolk sac via the omphalomesenteric (vitelline) duct.2
In some people, the duct persists due to incomplete
obliteration and resorption, thus giving rise to various
anatomical anomalies.
