What week does the Vitelline duct normally obliterate?

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. This results in discharge of meconium from the umbilicus.

When does the Vitelline duct disappear?

The vitelline duct is the embryonic communication between the yolk sac and the midgut, but it normally closes and disappears during the development process. According to the literature, it closes between the fifth and seventh weeks in humans1 and by 11 days after conception in rats2.

Is Meckel’s diverticulum serious?

Acute Meckel diverticulitis can occur at any age, but older children are most affected. A perforation (hole) in the diverticulum causes peritonitis , which is a very serious and painful inflammation of the abdominal cavity. Tumors, including carcinoid tumors , are rare and occur mainly in adults.

What is Meckel’s diverticulum caused by?

Meckel’s diverticulum occurs in a fetus early in the pregnancy. Normally, the vitelline duct, which connects the growing fetus with the yolk sac, is absorbed into the fetus by the seventh week of the pregnancy. When the vitelline duct is not fully absorbed, a Meckel’s diverticulum develops.

Why does the vitelline duct obliterate?

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 Meckel’s diverticulum?

Meckel’s diverticulum is an outpouching or bulge in the lower part of the small intestine. The bulge is congenital (present at birth) and is a leftover of the umbilical cord. Meckel’s diverticulum is the most common congenital defect of the gastrointestinal tract. It occurs in about 2% to 3% of the general population.

Is vitelline duct same as 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.

Can Meckel’s diverticulum come back?

Living with a Meckel’s diverticulum People who have surgery to remove the diverticulum often recover to live a full life. The pouch does not grow back.

What does the vitelline duct become?

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.

Is there a way to repair Meckel’s diverticulum?

Meckel’s diverticulum is a congenital (present at birth) outpouching or bulge in the lower part of the small intestine. The bulge is a leftover of the umbilical cord. If it causes symptoms, Meckel’s diverticulum can be repaired with surgery.

Which is true about the Meckel’s diverticulum?

Meckel’s diverticulum. (Redirected from Littre hernia) Jump to navigation Jump to search. A Meckel’s diverticulum, a true congenital diverticulum, is a slight bulge in the small intestine present at birth and a vestigial remnant of the omphalomesenteric duct (also called the vitelline duct or yolk stalk).

What happens when the vitelline duct is not fully absorbed?

When the vitelline duct is not fully absorbed, a Meckel’s diverticulum develops. A Meckel’s diverticulum may contain cells from both the stomach and pancreas. Cells from the stomach can secrete acid, which can cause ulcers and bleeding. What are the symptoms of Meckel’s diverticulum?

How old do you have to be to get a diverticulum repaired?

Most cases of Meckel’s diverticulum never cause symptoms and don’t require repair. Moreover, if symptoms of a Meckel’s diverticulum do occur, it often happens before the age of 2. The most common symptom is painless bleeding or hemorrhage from the rectum.