描述
Defects in 17-beta hydroxysteroid dehydrogenase III (HSD17B3) are the cause of male pseudohermaphrodism with gynecomastia. These individuals have unambiguous female external genitalia at birth, but fail to menstruate at the time of expected puberty and instead virilize as evidenced by growth of the phallus. A defect in HSD17B3 causes accumulation of dehydroepiandrosterone (DHEA), and dehydroepiandrosterone sulfate (DHEA-S) as well as androstenedione in plasma.