Processus vaginalis

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The processus vaginalis (or vaginal process) is an embryonic developmental outpouching of the peritoneum.

It is present from around the 12th week of gestation, and commences as a peritoneal outpouching.

Gender differences

In males, it precedes the testis in their descent down within the gubernaculum, and closes. This closure occurs at any point from a few weeks before birth, to a few weeks after birth. The remaining portion around the testes becomes the tunica vaginalis. [1]

It does not close in females. Instead, it forms the canal of Nuck. [2]

Clinical significance

Failure of closure of the processus vaginalis leads to the propensity to develop a number of abnormalities.

Peritoneal fluid can travel down a patent processus vaginalis leading to the formation of a hydrocele.

There is the potential for an inguinal hernia to develop, although not all people with a patent processus vaginalis will develop one. The more patent the processus vaginalis, the more likely the patient is to develope a hernia.

Persistent patent processus vaginalis more common on the right than the left.

See also

References

  1. "Chapter 34: Male genitalia". Retrieved 2007-12-01.
  2. "Definition: processus vaginalis of peritoneum from Online Medical Dictionary". Retrieved 2007-12-01.

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