A novel mutation of androgen receptor gene in complete androgen insensitivity syndrome.

Abstract

Androgen insensitivity syndrome (AIS) is an X-linked recessive disorder caused by mutation in the gene for the androgen receptor (AR) with 46,XY karyotype (OMIM 300068). The clinical phenotype of AIS is complete or partial. Complete AIS is characterized by a consistent phenotype: unambiguous female external genitalia, breast development at pubertal age, blind-ending vagina, absence of uterus, absent or scant pubic and axillary hair, and presence of normally differentiated testes in a girl or woman. However, the clinical features of partial AIS are variable: ambiguous external genitalia in a girl or woman, undervirilized external genitalia in a boy or man, or azospermia with unambiguous male external genitalia in a man (1,2,3,4). So far more than 300 mutations in all exons of the AR gene have been reported in complete AIS (5). We report a novel mutation of the AR gene in a patient with complete AIS.