An imperforate anus or anal atresia is a birth defectin which the rectumis malformed. Its cause is unknown.
- 1 Features
- 2 Treatment
- 3 Prognosis
- 4 Epidemiology
- 5 References
There are several forms of imperforate anus:
- A low lesion, in which the colonremains close to the skin. In this case, there may be a stenosis(narrowing) of the anus, or the anus may be missing altogether, with the rectumending in a blind pouch.
- A high lesion, in which the colonis higher up in the pelvisand there is a fistulaconnecting the rectum and the bladder, urethraor the vagina.
- A cloaca(named after the analogous orifice in amphibians), where the rectum, vagina and colon are joined into a single opening.
Imperforate anus usually presents along with other birth defects—spinalproblems, anal atresia, heartproblems, tracheoesophageal fistula, esophageal atresia, renalanomalies, and limbanomalies.
Imperforate anus usually requires immediate surgeryto open a passage for faeces. Depending on the severity of the imperforate, it is either treated with a perineal anoplastyor colostomy.
With a high lesion, many children have problems controlling bowel function and most also become constipated. With a low lesion, children generally have good bowel control, but they may still become constipated.
Imperforate anus has an estimated incidence of 1 in 5,000 live births. It is more common in boys than in girls.
- Texas Pediatric Associates. "Imperforate anus." Retrieved 13 July, 2005.
- MedLine Plus. "Imperforate anus." Retrieved 13 July, 2005.
Categories: Medicine stubs| Congenital disorders| Proctology
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It uses material from the http://en.wikipedia.org/wiki/Imperforate+anus Wikipedia article Imperforate anus.