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Androgen Insensitivity Syndrome Information

Androgen insensitivity syndrome (AIS, or "Androgen resistance syndrome") is a set of disorders of sexual differentiation that results from mutations of the gene encoding the androgen receptor. It has also been called androgen resistance in the medical literature. The nature of the resulting problem varies according to the structure and sensitivity of the abnormal receptor. Most of the forms of AIS involve variable degrees of undervirilization and/or infertility in XY persons of either sex. A woman with complete androgen insensitivity syndrome (CAIS) has a nearly normal female body despite a 46XY karyotype and testes, a condition termed testicular feminization in the past.

Major changes in the understanding and management of the various forms of AIS have occurred since 1990. Laboratory research has greatly expanded our understanding of the molecular mechanisms of the clinical features, including a rare neuromuscular disorder. More importantly, patient advocacy groups for AIS and other intersex conditions have increased public awareness of these disorders, helped revise our understanding of gender identity, emphasized the value of accurate and sophisticated information for patients, and induced physicians to re-evaluate the effectiveness of the surgical corrections attempted in past decades. Surgery is increasingly seen as a very elective option even for the more ambiguous conditions.

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