Patent urachus
A birth defect involving the urachus, a canal connecting the bladder of the fetus with the allantois, a structure that contributes to the formation of the umbilical cord. The lumen (inside) of the urachus is normally obliterated during embryonic development, transforming the urachus into a solid cord, a functionless remnant. Failure for the lumen of the urachus to be filled in leaves a patent (open) urachus. The telltale sign is leakage of urine through the umbilicus. A patent urachus needs to be surgically removed.

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a congenital anomaly in which the urachus remains patent from the bladder to the umbilicus, with a channel that may be small or large and leakage of urine at the umbilicus.

Medical dictionary. 2011.

Look at other dictionaries:

  • Urachus — Infobox Embryology Name = PAGENAME Latin = GraySubject = 252 GrayPage = 1213 Caption = Vertical section of bladder, penis, and urethra. Urachus is seen at top Caption2 = Urachus is #1 System = CarnegieStage = Days = Precursor = GivesRiseTo =… …   Wikipedia

  • Urachus — A canal connecting the bladder of the fetus with the allantois, a structure that contributes to the formation of the umbilical cord. The lumen (inside) of the urachus is normally obliterated during embryonic development, transforming the urachus… …   Medical dictionary

  • urachus — n. the remains of the cavity of the allantois, which usually disappears during embryonic development. In the adult it normally exists in the form of a solid fibrous cord connecting the bladder with the umbilicus, but it may persist abnormally as… …   The new mediacal dictionary

  • urachal fistula — a fistula resulting from a patent urachus communicating with the umbilicus and urinary bladder …   Medical dictionary

  • Allantois — Infobox Embryology Name = Allantois Latin = GraySubject = 12 GrayPage = 54 Caption = Diagram illustrating early formation of allantois and differentiation of body stalk. Caption2 = Sectional plan of the gravid uterus in the third and fourth month …   Wikipedia

  • Canal of Nuck — Latin processus vaginalis peritonei femininus Gray s subject #268 1261 The canal of Nuck, described by Anton Nuck in 1691,[1] …   Wikipedia

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