raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:90793

Congenital adrenal hyperplasia due to 17-alpha-hydroxylase deficiency

Synonyms: CAH due to 17-alpha-hydroxylase deficiency · Combined 17-hydroxylase/17,20-lyase deficiency

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A 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.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital adrenal hyperplasia due to 17-alpha-hydroxylase deficiencyCAH due to 17-alpha-hydroxylase deficiency · Combined 17-hydroxylase/17,20-lyase deficiency
frHyperplasie congénitale des surrénales par déficit en 17-alpha-hydroxylaseDéficit combiné en 17-hydroxylase/17,20-lyase · HCS par déficit en 17-alpha-hydroxylase
deNebennierenhyperplasie, kongenitale, durch 17-alpha-Hydroxylase-MangelCAH durch 17-alpha-Hydroxylase-Mangel · Kombinierter 17-Hydroxylase/17,20-Lyase-Mangel · Kongenitale adrenale Hyperplasie durch 17-alpha-Hydroxylase-Mangel
esHiperplasia suprarrenal congénita por deficiencia de 17-alfa-hidroxilasaCAH por deficiencia de 17-alfa-hidroxilasa · Deficiencia combinada 17-hidroxilasa/17,20-liasa
itIperplasia congenita del surrene da deficit di 17-alfa-idrossilasiCAH da deficit di 17-alfa-idrossilasi · Deficit combinato di 17-idrossilasi/17,20-liasi
nlCongenitale adrenale hyperplasie door deficiëntie van 17-alfa-hydroxylaseCAH door deficiëntie van 17-alfa-hydroxylase · Congenitale bijnierhyperplasie door deficiëntie van 17-alfa-hydroxylase · Gecombineerde deficiëntie van 17-hydroxylase/17,20-lyase
ptHiperplasia supra-renal congénita por deficiência de 17-alfa-hidroxilaseCAH por deficiência de 17-alfa-hidroxilase · Deficiência combinada de 17-hidroxilase/17,20-liase
plWrodzony przerost nadnerczy spowodowany niedoborem 17-alfa-hydroksylazyCAH spowodowany niedoborem 17-alfa-hydroksylazy · Złożony Niedobór 17-hydroksylazy/17,20-liazy
csVrozená adrenální hyperplázie způsobená deficitem 17-alfa-hydroxylázyKombinovaný deficit 17-hydroxylázy/17,20-lyázy
ukВроджена гіперплазія надниркових залоз внаслідок дефіциту 17-альфа-гідроксилазиАГС внаслідок дефіциту 17-альфа-гідроксилази · Поєднаний дефіцит 17-гідроксилази/17,20-ліази
zh17α-羟化酶缺乏所致先天性肾上腺皮质增生症17-羟化酶/17,20-裂解酶联合缺乏
tr17-alfa-hidroksilaz eksikliğine bağlı doğumsal adrenal hiperplazi17-alfa-hidroksilaz eksikliğine bağlı CAH · Kombine 17-hidroksilaz / 17,20-liyaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM202110Evalidated
ICD-10E25.0NTBTattributedvalidated
ICD-115A71.01NTBTindexvalidated
MONDO0008730Evalidated
MeSHC538237Evalidated
UMLSC0268285Evalidated
GARD1469Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (8):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CYP17A1Disease-causing germline mutation(s) inAssessedHGNC:2593ENSG0000014879560930010q24.32cytochrome P450 family 17 subfamily A member 1
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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 1 000 0000.1 / 100 000EuropeValue and classValidated[EXPERT]

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

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HPO phenotypes

41 annotations · validated 2021-04-02
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0031074Abnormal response to ACTH stimulation test
HP:0500022Abnormal serum dehydroepiandrosterone level
HP:0008258Congenital adrenal hyperplasia
HP:0040171Decreased serum testosterone concentration
HP:0000822Hypertension
HP:0032362Increased circulating corticosterone level
HP:0000837Increased circulating gonadotropin level
HP:0032330Increased urinary 11-deoxycorticosterone level
Frequent (79-30%)
HP:0008197Absence of pubertal development
HP:0008187Absence of secondary sex characteristics
HP:0011749Adrenocorticotropic hormone excess
HP:0008689Bilateral cryptorchidism
HP:0004319Decreased circulating aldosterone level
HP:0008163Decreased circulating cortisol level
HP:0003351Decreased circulating renin concentration
HP:0000144Decreased fertility
HP:0000823Delayed puberty
HP:0002750Delayed skeletal maturation
HP:0008232Elevated circulating follicle stimulating hormone level
HP:0011969Elevated circulating luteinizing hormone level
HP:0000771Gynecomastia
HP:0002900Hypokalemia
HP:0000047Hypospadias
HP:0031216Increased circulating progesterone
HP:0000858Irregular menstruation
HP:0000026Male hypogonadism
HP:0000138Ovarian cyst
HP:0000786Primary amenorrhea
Occasional (29-5%)
HP:0002221Absent axillary hair
HP:0002555Absent pubic hair
HP:0000033Ambiguous genitalia, male
HP:0000151Aplasia of the uterus
HP:0000048Bifid scrotum
HP:0040314Blind vagina
HP:0001508Failure to thrive
HP:0008730Female external genitalia in individual with 46,XY karyotype
HP:0003251Male infertility
HP:0000054Micropenis
HP:0003394Muscle spasm
HP:0010465Precocious puberty in females
HP:0008207Primary adrenal insufficiency

Run the differential on the 8 obligate / very frequent terms

Annotation source: 20170344[PMID]_26862015[PMID]

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Sources for this card