Atresia: Absence of a normal opening or failure of a structure to be tubular.
Atresia can affect many structures in the body, including:
- Anal atresia -- congenital absence of a hole at the bottom end of the intestine. Also called imperforate anus.
- Aortic atresia -- congenital absence of the normal valvular opening into the aorta.
- Biliary atresia -- absence of the major bile ducts, causing jaundice.
- Choanal atresia -- congenital failure of one or both nasal passages to open.
- Esophageal atresia -- a birth defect in which part of esophagus is not hollow.
- Intestinal atresia -- obliteration of the hollow of the small intestine, involving the ileum (50% of cases) or the jejunum or duodenum.
- Laryngeal atresia -- congenital failure of the laryngeal opening to develop, resulting in partial or total obstruction at or just above or below the glottis.
- Pulmonary atresia -- congenital absence of the pulmonary valve opening in the heart.
- Tricuspid atresia -- congenital lack of the tricuspid valve opening.
- Vaginal atresia -- congenital occlusion of the vagina
or subsequence adhesion (sticking together) of the walls of the vagina
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Library > Literature & Language > Dictionary ( É™-trÄ“ ' zhÉ™, -zhÄ“-É™ ) n. The absence or closure of a normal body orifice or tubular passage such as the anus ...
atresia /atreÂ·sia/ (ah-treÂ´zhah) congenital absence or closure of a normal body opening or tubular structure.atretÂ´ic. anal atresia , atresia aÂ´ni imperforate anus
Atresia: Absence of a normal opening or failure of a structure to be tubular. Atresia can affect many structures in the body, including: Anal atresia -- congenital absence ...
noun Medicine/Medical . the congenital absence, or the pathological closure, of an opening, passage, or cavity. Origin: 1800â€“10; < Neo-Latin < Greek a- a- 6 + trÃªs ...
aÂ·treÂ·sia (-tr zh, -zh-) n. 1. The absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.