What is the median umbilical ligament?
A fibrous cord that connects the urinary bladder to the umbilicus (navel). The median umbilical ligament is formed as the allantoic stalk during fetal development and lasts through life. Also called urachus.
What forms the median and lateral umbilical ligaments?
The median umbilical ligament begins as the allantois in the embryonic period. It then becomes the urachus in the fetus. This later develops into the median umbilical ligament at birth. It is also formed from the cloaca in utero.
What forms the medial umbilical ligament?
The medial umbilical ligament arises from the anterior division of the internal iliac artery.
Is the urachus the umbilical cord?
The urachus is a fibrous remnant of the allantois, a canal that drains the urinary bladder of the fetus that joins and runs within the umbilical cord. The fibrous remnant lies in the space of Retzius, between the transverse fascia anteriorly and the peritoneum posteriorly.
Is Urachus the same as median umbilical ligament?
The median umbilical ligament is a fibrous band located in the anterior portion of the abdomen, anterior to the urinary bladder. It contains the urachus, which is an embryonic remnant resulting from involution of the allantoic duct that connects the fetal urinary bladder to the umbilicus.
Is urachus the same as median umbilical ligament?
How many umbilical ligaments are there?
The folds are 2 of the 5 umbilical folds and should not be confused with the single midline median umbilical fold. The bilateral supravesical fossae lie between the median and bilateral medial umbilical folds. The medial fossae lie between the medial and lateral umbilical folds.
How common is patent urachus?
Patent urachus is a rare disorder with an estimated prevalence of 1 to 2 cases per 100,000 deliveries. The urachus is the intra-abdominal remnant of the embryologic allantois, which is seen approximately 16 days after conception as a diverticulum from the caudal wall of the yolk sac.
What is the function of the urachus?
The urachus is a fibrous cord arising from the early fetal anterior bladder wall to the allantois, extending cranially to the umbilicus [1]. In the first trimester of gestation, the role of the urachus is to facilitate the removal of the neonate’s nitrogenous waste through the placenta via the umbilical cord [1].