title: A case of 17 alpha-hydroxylase deficiency.
abstract: 17α-hydroxylase and 17,20-lyase are enzymes encoded by the CYP17A1 gene and are required for the synthesis of sex steroids and cortisol. In 17α-hydroxylase deficiency, there are low blood levels of estrogens, androgens, and cortisol, and resultant compensatory increases in adrenocorticotrophic hormone that stimulate the production of 11-deoxycorticosterone and corticosterone. In turn, the excessive levels of mineralocorticoids lead to volume expansion and hypertension. Females with 17α-hydroxylase deficiency are characterized by primary amenorrhea and delayed puberty, with accompanying hypertension. Affected males usually have female external genitalia, a blind vagina, and intra-abdominal testes. The treatment of this disorder is centered on glucocorticoid and sex steroid replacement. In patients with 17α-hydroxylase deficiency who are being raised as females, estrogen should be supplemented, while genetically female patients with a uterus should also receive progesterone supplementation. Here, we report a case of a 21-year-old female with 17α-hydroxylase deficiency who had received inadequate treatment for a prolonged period of time. We also include a brief review of the recent literature on this disorder.
authors.affiliation: Saint Mary's Women's Hospital, Daegu, Korea.
authors.forename: Sung Mee
authors.initials: SM
authors.lastname: Kim
authors.affiliation: Department of Obstetrics and Gynecology, Keimyung University College of Medicine, Daegu, Korea.
authors.forename: Jeong Ho
authors.initials: JH
authors.lastname: Rhee
keywords: 17 alpha-Hydroxylase deficiency; Amenorrhea; Delayed puberty; Hypertension