raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:753

46,XY difference of sex development due to 5-alpha-reductase 2 deficiency

Synonyms: 46,XY DSD due to 5-alpha-reductase 2 deficiency · 46,XY disorder of sex development due to 5-alpha-reductase 2 deficiency · Pseudovaginal perineoscrotal hypospadias · Steroid 5-alpha-reductase 2 deficiency

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

A rare difference of sex development (DSD) due to a defect in metabolizing testosterone to dihydrotestosterone and characterized by incomplete intrauterine masculinization which ranges from a female genitalia with a blind vaginal pouch to a fully male phenotype with pseudovaginal posterior hypospadias and micropenis.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en46,XY difference of sex development due to 5-alpha-reductase 2 deficiency46,XY DSD due to 5-alpha-reductase 2 deficiency · 46,XY disorder of sex development due to 5-alpha-reductase 2 deficiency · Pseudovaginal perineoscrotal hypospadias · Steroid 5-alpha-reductase 2 deficiency
frDifférence du développement sexuel 46,XY par déficit en 5-alpha-réductase de type 2ADS 46,XY par déficit en 5-alpha-réductase de type 2 · Anomalie du développement sexuel 46,XY par déficit en 5-alpha-réductase de type 2 · Déficit en stéroïde-5-alpha réductase de type 2 · Hypospadias périnéo-scrotale pseudovaginale
deStörung der Geschlechtsentwicklung 46,XY, durch 5-Alpha-Reduktase 2-Mangel46,XY DSD durch 5-Alpha-Reduktase 2-Mangel · Pseudovaginale perineoskrotale Hypospadie · Steroid-5-Alpha-Reduktase 2-Mangel
esDesarrollo sexual diferente 46,XY por deficiencia de 5-alfa-reductasa 2DSD 46,XY por deficiencia de 5-alfa-reductasa 2 · Deficiencia de esteroide 5-alfa-reductasa · Hipospadias perineoescrotal pseudovaginal · Trastorno del desarrollo sexual 46,XY por deficiencia de 5-alfa-reductasa 2
itAlterato sviluppo sessuale 46,XY da deficit di 5-alfa-reduttasi 2DSD 46,XY da deficit di 5-alfa-reduttasi 2 · Deficit di steroido-5-alfa-reduttasi · Ipospadia pseudo-vaginale perineo-scrotale
nl46,XY-geslachtsontwikkelingsstoornis door deficiëntie van 5-alfa-reductase 246,XY-DSD door 5-alfa-reductase 2-deficiëntie · Deficiëntie van steroïde 5-alfa-reductase · Pseudovaginale perineoscrotale hypospadie
ptDoença do desenvolvimento sexual 46,XY por deficiência de 5-alfa-redutase 2DDS 46,XY por deficiência de 5-alfa-redutase 2 · Hipospadias perineo-escrotal pseudo-vaginal
plZaburzenie różnicowania płci spowodowane niedoborem 5-alfa-reduktazy 2Niedobór 5-alfa-reduktazy steroidowej · Pseudohermafrodytyzm męski spowodowany niedoborem 5-alfa-reduktazy 2 · ZRP 46,XY spowodowane niedoborem 5-alfa-reduktazy 2
cs46,XY porucha pohlavního vývoje způsobená deficitem 5-alfa-reduktázy 246, XY DSD, deficit 5-alfa reduktázy · Pseudovaginální perineoskrotální hypospadie · Deficit steroid 5-alfa-reduktázy · Mužský pseudohermafroditismus způsobený deficitem 5-alfa-reduktázy 2
uk46,XY порушення статевої диференціації, зумовлене дефіцитом 5-альфа-редуктази 246,XY порушення статевого розвитку внаслідок дефіциту 5-альфа-редуктази 2 · 46,XY ПСР внаслідок дефіциту 5-альфа-редуктази 2 · Псевдовагінальні перинеосакральні гіпоспадії · Дефіцит стероїдної 5-альфа-редуктази 2
zh5-α还原酶2缺乏所致男性假两性畸形5-α-还原酶缺乏所致46,XY男性假两性畸形
tr5-alfa-redüktaz 2 eksikliğine bağlı 46,XY cinsiyet gelişim bozukluğuSteroid 5-alfa redüktaz eksikliği · Psödovajinal perineoskrotal hipospadiyas · 5-alfa-redüktaz 2 eksikliğine bağlı 46,XY DSD

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM264600Evalidated
ICD-10E29.1NTBTattributedvalidated
ICD-11LD2A.3NTBTindexvalidated
MONDO0009923Evalidated
MeSHC535830Evalidated
UMLSC0268297Evalidated
GARD5680Evalidated
MedDRA10000029Evalidated

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

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SRD5A2Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:11285ENSG000002778936073062p23.1steroid 5 alpha-reductase 28723114[PMID]_9497950[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyValidated[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.

6

HPO phenotypes

10 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000818Abnormality of the endocrine system
HP:0000062Ambiguous genitalia
HP:0000033Ambiguous genitalia, male
HP:0000048Bifid scrotum
HP:0000028Cryptorchidism
HP:0000144Decreased fertility
HP:0008736Hypoplasia of penis
HP:0000051Perineal hypospadias
HP:0000046Small scrotum
HP:0100779Urogenital sinus anomaly

Run the differential on the 10 obligate / very frequent terms

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Sources for this card