When does the Vitelline duct regress?

Generally, the duct fully obliterates (narrows and disappears) during the 5–6th week of fertilization age (9th week of gestational age), but a failure of the duct to close is termed a vitelline fistula.

Does the vitelline duct become the umbilical cord?

The vitelline duct is also referred to as the omphalomesenteric duct and the yolk stalk. The allantois has begun to grow into the body stalk. (C) The yolk and body stalks fuse to become the umbilical cord. As the abdominal wall forms, the umbilical ring is narrowed.

Is the vitelline duct the umbilical cord?

Umbilical cord development begins in the embryologic period around week 3 with the formation of the connecting stalk. By week 7, the umbilical cord has fully formed, composed of the connecting stalk, vitelline duct, and umbilical vessels surrounding the amniotic membrane.

How vitelline duct is formed?

A constriction in the yolk sac encloses a small part of yolk sac within the embryo, forming the primitive digestive tube. Connection of the yolk sac to the embryonic digestive system is gradually reduced to a small tube called the vitelline duct (sometimes called the umbilical vesicle).

What is Allantoic cyst?

Allantoic cyst is a rare swelling formed at the base of umbilicus associated with a patent urachus which results from an allantoic remnant. Paediatricians need to be aware about this condition as investigation is required to differentiate allantois cysts from umbilical pseudocysts.

When does the omphalomesenteric duct usually obliterate?

The omphalomesenteric duct serves as a communication between the midgut and yolk sac In early embryonic life and usually obliterates between the 9-18 th week of gestation. The omphalomesenteric duct cyst is an embryologic remnant of the yolk stalk. If the yolk stalk does not obliterate completely, various portions may persist giving rise…

When did Meckel describe the ductus omphalomesentericus?

Persistent ductus omphalomesentericus is of infrequent occurrence. In 1812, Meckel 1 described the involution of the ductus omphalomesentericus resulting in a persistent diverticulum. Since that time Cullen 2 has reviewed the literature concerning the irregularities of the involution of preumbilical structures.

How is the omphalomesenteric duct cyst a pathology?

Pathology. The omphalomesenteric duct cyst is an embryologic remnant of the yolk stalk. If the yolk stalk does not obliterate completely, various portions may persist giving rise to many entities including an omphalomesenteric duct cyst. The cysts are lined by a columnar mucin-secreting epithelium.

Is the omphalomesenteric cyst part of the yolk stalk?

The omphalomesenteric duct cyst is an embryologic remnant of the yolk stalk. If the yolk stalk does not obliterate completely, various portions may persist giving rise to many entities including an omphalomesenteric duct cyst. The cysts are lined by a columnar mucin-secreting epithelium.