PLE-1623

An attractive, normal-appearing 25-year-old woman seeks medical attention because she has not experienced a menstrual period and cannot get pregnant. Upon physical examination, the external genitalia appear normal, although a rudimentary vagina is found. In addition, the uterus and uterine tubes are absent. Round masses can be palpated in the labia majora. Karyotype analysis indicates 46,XY. What is the most likely diagnosis?