Patent urachus

Patent urachus is a type of congenital urachal anomaly (see this term) characterized by a persistent communication between the bladder and the umbilicus, secondary to non occlusion of the urachal lumen, manifesting as clear drainage from the umbilicus.

Cloacal abnormality

A developmental anomaly associated with the failure of rectum, vagina, and bladder to separate.


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PMID (PMCID)
1839835
 FEMALE Infant, Newborn
Emergency separation of conjoined twins.
Walton JM, Gillis DA, Giacomantonio JM, Hayashi AH, Lau HY.
J Pediatr Surg. 1991;26(11):1337-40.
Shared tissue included conjoined bowel; one twin also had a complex cloacal abnormality and patent urachus.