Medical Definition of Atresia, anal

Atresia, anal: Congenital absence of an opening at the bottom end of the intestinal tract. Also called imperforate anus. Occurs in about 1 in 5,000 births. It is corrected by surgery.

Atresia refers to the absence of a normal opening.

Quick GuideDigestive Disorders: Common Misconceptions

Digestive Disorders: Common Misconceptions

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Last Editorial Review: 9/14/2016

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