Orphanet: Classic congenital adrenal hyperplasia due to 21 hydroxylase deficiency, simple virilizing form

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Classic congenital adrenal hyperplasia due to 21-hydroxylase deficiency, simple virilizing form

Disease definition

The simple virilizing form of classical congenital adrenal hyperplasia due to 21-hydroxylase deficiency (classical 21 OHD CAH; see this term) is characterized by genital ambiguity and virilization of the external genitalia in females, hypocortisolism and precocious pseudopuberty without salt-wasting.


Classification level: Subtype of disorder
  • Synonym(s):
    • Classic 21-OHD CAH, simple virilizing form
  • Prevalence: 1-9 / 100 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: E25.0
  • OMIM: -
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -

Detailed information


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