What is a omphalomesenteric duct?
The omphalomesenteric duct is the embryonic structure connecting the primary yolk sac to the embryonic midgut that normally becomes a thin fibrous band, which eventually disintegrates and is absorbed spontaneously at the 5th-10th wk of gestation[5,6].
What is the function of the omphalomesenteric duct?
The omphalomesenteric duct (vitelline duct) connects the yolk sac to the small intestine. This duct obliterates when the embryo is about 6 weeks old. Complete failure of the duct to obliterate results in a fistula from the ileum to the umbilicus (vitelline fistula).
How is vitelline duct 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 omphalomesenteric duct remnant?
The omphalomesenteric duct is an embryologic connection between the digestive tract and yolk sac, which typically involutes by the time of birth. Failure of the obliteration process can result in omphalomesenteric duct remnants.
Where is the omphalomesenteric duct located?
Embryology and Anatomy The vitelline duct acts as a communicating tract between the embryonic yolk sac and its primitive midgut during early human development. During the eighth week of gestation, the vitelline duct is normally obliterated as the placenta replaces the yolk sac as the primary source for fetal nutrition.
What is a Omphalomesenteric fistula?
Omphalomesenteric fistula occurs as a result of failure of obliteration of the omphalomesenteric duct. It is one of the congenital fistulas of the gastrointestinal tract. The treatment of choice is often a partial transumbilical resection with umbilical restitution.
What is the function of Vitelline membrane?
The vitelline membrane (VM) is a multilayered structure that protects and gives shape to the egg yolk and separates it from the egg white. Together with the chalaza, VM keeps the egg yolk in the central part of the egg, thereby preventing its integration with the shell membranes.
Which of the following is caused by a persistence of the omphalomesenteric duct beyond fetal development?
The persistence of the omphalomesenteric duct beyond fetal development may result in a variety of anatomic patterns (figure 1), including omphalomesenteric cysts, omphalomesenteric fistulae that drain through the umbilicus, and fibrous bands from the diverticulum to the umbilicus (picture 1) that predispose to bowel …
What are the alternative names for the omphalomesenteric duct?
In the human embryo, the vitelline duct, also known as the vitellointestinal duct, the yolk stalk, the omphaloenteric duct, or the omphalomesenteric duct, is a long narrow tube that joins the yolk sac to the midgut lumen of the developing fetus.
What is vitelline duct?
The vitelline duct (VD) is an embryonic structure providing communication from the yolk sac to the midgut during fetal development [1]. Normally, it obliterates spontaneously and separates from the intestine between approximately the 5th and 9th weeks of gestation [2].
What is the omphalomesenteric duct?
This channel is known as the omphalomesenteric duct and is also referred to as the vitellointestinal duct. The embryology is well described by Cullen. 1 As development proceeds, the duct becomes narrower and lies within the umbilical cord. Under normal conditions the duct disappears and the intestine has no connection with the yolk sac.
What is the vitelline duct in the human embryo?
Vitelline duct. In the human embryo, the vitelline duct, also known as the vitellointestinal duct, the yolk stalk, the omphaloenteric duct, or the omphalomesenteric duct, is a long narrow tube that joins the yolk sac to the midgut lumen of the developing fetus. It appears at the end of the fourth week,…
What is the prevalence of allantoic duct remnant in umbilical cord?
Allantoic duct remnant is present in the proximal portion of 15% of umbilical cords Omphalomesenteric duct remnant is present in about 1.5% of umbilical cords, often associated with remnants of vitelline vessels, seen in about 7% of umbilical cords
What connects the midgut lumen with the yolk sac?
Omphalomesenteric (vitelline) duct connects the midgut lumen with the yolk sac in the developing fetus Allantoic duct remnant is present in the proximal portion of 15% of umbilical cords
