Congenital adrenal hyperplasia due to 3-beta-hydroxysteroid dehydrogenase deficiency

What it is

A rare form of congenital adrenal hyperplasia (CAH) due to 3-beta-hydroxysteroid dehydrogenase (HSD3B2) deficiency and characterized by salt-wasting and non-salt wasting CAH with a wide variety of symptoms, including glucocorticoid and mineralocorticoid deficiencies in both sexes. Salt wasting can lead to dehydration and hypotension in the first few weeks of life. Affected males had undervirilization manifesting as a micropenis to severe perineoscrotal hypospadias. Females show normal or mildly virilized external genitalia (mild clitoromegaly, labial fusion) due to dehydroepiandrosterone (DHEA) accumulation and conversion to androgens by the normal HSD3B1.

Key facts

Prevalence

<1 / 1 000 000

Age of onset

Infancy, Neonatal

Inheritance

Autosomal recessive

Classified as

Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Signs and symptoms

These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.

Gene

ICD-10 codes

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Cross-references