A Likely Diagnosis of Familial Partial Androgen Insensitivity Syndrome in Three 46, XY Siblings With Ambiguous Genitalia: A Case Series.

Familial partial androgen insensitivity syndrome is a rare cause of 46, XY disorder of sex development. It includes marked phenotypic variability, even among siblings. Persistent undervirilization despite normal androgen levels should prompt early multidisciplinary evaluation and counseling, especially where genetic testing is limited.