Medical Definition of Anal atresia
Anal atresia: 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 here to the absence of a normal opening.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/9/2016
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