Median umbilical ligament
The median umbilical ligament is an unpaired ligamentous structure in human anatomy which extends from the apex of the bladder to the umbilicus, on the deep surface of the anterior abdominal wall. It is a fibrous piece of tissue that represents the remnant of the fetal urachus, which forms from the embryonic allantois. It is covered by the median umbilical fold.
|Median umbilical ligament|
Posterior view of the anterior abdominal wall in its lower half. The peritoneum is in place, and the various cords are shining through. Median umbilical ligament isn't labeled, but it is located just underneath the median umbilical fold, seen in the center of the diagram
|From||Apex of urinary bladder|
|Latin||Ligamentum umbilicale medianum, |
ligamentum suspensorium vesicae urinariae
It may be used as a landmark for surgeons who are performing laparoscopy, such as laparoscopic inguinal hernia repair. Other than this, it has no function in a born human and may be cut or removed with impunity.
It contains the urachus, which is the obliterated form of the allantois. The allantois forms a communication between the cloaca (terminal part of hindgut) and the amniotic sac during embryonic development. If the urachus fails to close during fetal life, it can result in anatomical abnormalities such as a urachal cyst, urachal fistula, urachal diverticulum or urachal sinus.
- Median umbilical ligament
- Anatomy figure: 36:01-01 at Human Anatomy Online, SUNY Downstate Medical Center - "The inguinal canal and derivation of the layers of the spermatic cord."
- Anatomy photo:44:04-0105 at the SUNY Downstate Medical Center - "The Male Pelvis: The Urinary Bladder"
- Anatomy image:7576 at the SUNY Downstate Medical Center
- Median umbilical fold
- Anatomy figure: 36:03-12 at Human Anatomy Online, SUNY Downstate Medical Center - "Internal surface of the anterior abdominal wall."