Atresia
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Atresia is a condition in which a body orifice or passage in the body is abnormally closed or absent.
Examples of atresia include:
- Biliary atresia
- Ovarian follicle atresia, atresia refers to the degeneration and subsequent resorption of one or more immature ovarian follicles.
- Vaginal atresia - congenital occlusion of the vagina or subsequence adhesion (sticking together) of the walls of the vagina occluding it.
- Esophageal atresia - affects the alimentary tract causing the esophagus to end before connecting normally to the stomach.
- Choanal atresia - blockage of the back of the nasal passage, usually by abnormal bony or soft tissue.
- Anorectal atresia - malformation of the opening between the rectum and anus.
- Pulmonary atresia - malformation of the pulmonary valve in which the valve orifice fails to develop.
- Aural atresia (see Microtia) - a congenital deformity of the pinna (outer ear).
- Intestinal atresia - malformation of the intestine
References
http://www.medterms.com/script/main/art.asp?articlekey=2381
External links
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