What is atresia?

Atresia is absence or closure of a normal body opening or canal.
biliary a. A condition of infants who are born without functioning bile ducts; unless they receive a liver transplant, these children usually die after several years because of resultant cirrhosis.
esophageal a. Congenital failure of the full esophageal lumen to develop.
tricuspid a. Absence of the opening between the right atrium and right ventricle.

Atresia is a condition in which an orifice or passage in the body is closed or absent.
Examples of atresia include:
Aural atresia, a congenital deformity where the ear canal is underdeveloped.…

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