raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79302

Congenital bile acid synthesis defect type 3

Synonyms: BASD3 · Oxysterol 7-alpha-hydroxylase deficiency

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

Congenital bile acid synthesis defect type 3 (BAS defect type 3) is a severe anomaly of bile acid synthesis characterized by severe neonatal cholestatic liver disease.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital bile acid synthesis defect type 3BASD3 · Oxysterol 7-alpha-hydroxylase deficiency
frDéficit congénital de synthèse des acides biliaires type 3DSAB3 · Déficit en oxystérol 7-alpha-hydroxylase
deGallensäuresynthesedefekt, kongenitaler, Typ 3BASD3 · Oxysterol 7-alpha-Hydroxylase-Mangel
esDefecto congénito de la síntesis de ácidos biliares tipo 3BASD3 · Deficiencia de oxiesterol 7-alfa-hidroxilasa
itDifetto congenito della sintesi degli acidi biliari, tipo 3
nlCongenitaal defect van galzuursynthese type 3BASD3 · Deficiëntie van oxysterol 7-alfa-hydroxylase
ptDefeito congénito da síntese de ácidos biliares tipo 3BASD3 · Deficiência de oxiesterol 7-alfa-hidroxilase
plWrodzony defekt syntezy kwasów żółciowych typu 3BASD3 · Niedobór 7-alfa-hydroksylazy oksysterolowej
csVrozený defekt syntézy žlučových kyselin, typ 3Deficit oxysterol-7-alfa-hydroxylázy
ukВроджений дефект синтезу жовчних кислот, тип 3BASD3 · Дефіцит оксистерол-7-альфа-гідроксилази
zh先天性胆汁酸合成缺陷2型氧固醇7-α-羟化酶缺乏症
trDoğumsal safra asidi sentez bozukluğu tip 3BASD3 · Oksisterol 7-alfa-hidroksilaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM613812Evalidated
ICD-10K76.8NTBTattributedvalidated
ICD-115C52.11NTBTindexvalidated
MONDO0013439Evalidated
MeSHC566340Evalidated
UMLSC4304715Evalidated

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 (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CYP7B1Disease-causing germline mutation(s) inAssessedHGNC:2652ENSG000001728176037118q12.3cytochrome P450 family 7 subfamily B member 19802883[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated9802883[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_9802883[PMID]

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

12 annotations · validated 2021-11-26
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0100508Abnormality of vitamin metabolism
HP:0001408Bile duct proliferation
HP:0001396Cholestasis
HP:0001394Cirrhosis
HP:0031964Elevated circulating alanine aminotransferase concentration
HP:0003155Elevated circulating alkaline phosphatase concentration
HP:0031956Elevated circulating aspartate aminotransferase concentration
HP:0002630Fat malabsorption
HP:0001399Hepatic failure
HP:0001433Hepatosplenomegaly
HP:0002904Hyperbilirubinemia
HP:0000952Jaundice

Annotation source: 17682975[PMID]_18367963[PMID]

7

Sources for this card