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π CustomizeMedical Overview of Deficiency Of Steroid 17-Alpha-Monooxygenase
Sources citedA rare form of congenital adrenal hyperplasia due to 17-alpha-hydroxylase (CYP17A1) deficiency and characterized by glucocorticoid deficiency, mineralocorticoid excess leading to hypokalemic hypertension and sex steroid deficiency (hypergonadotrophic hypogonadism). Undervirilization and even female phenotype in 46,XY males, primary amenorrhea in females and lack of pubertal development in both sexes is common. Residual CYP17A1 activity is associated with the severity of this condition with a large spectrum of variability, from presenting in early infancy, to unusually mild courses with isolated sex steroid deficiency but normal ACTH-stimulated cortisol in adult patients.
Classification & codes: GARD 0001469 · Orphanet ORPHA:90793 · OMIM 202110 · ICD-10 E25.0
Sources: GARD (NIH/NCATS), Orphanet Β· last reviewed 2026. Educational only β not medical advice.
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Sources: GARD (NIH/NCATS), Orphanet Β· last reviewed 2026. Educational only β not medical advice.