raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:244283

Biliary atresia with splenic malformation syndrome

Synonyms: BASM syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Multigenic/multifactorial
Age of onset
Infancy, Neonatal
Status
active

Biliary atresia with splenic malformation syndrome (BASM) designates the association of biliary atresia and splenic abnormalities (mainly polysplenia and less frequently asplenia, double spleen). Cardiac defect, situs inversus and a preduodenal portal vein can also be present. It represents the embryonal or syndromic form of biliary atresia. It affects newborns or infants and is characterized by jaundice, pale stools, dark urine, failure to thrive, hepatomegaly, coagulopathy, anemia and often palpable spleen.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enBiliary atresia with splenic malformation syndromeBASM syndrome
frAtrésie biliaire avec malformation spléniqueSyndrome BASM
deBiliäre Atresie-Milzfehlbildung-SyndromBASM-Syndrom · Gallengangatresie - Milzfehlbildung
esAtresia biliar con síndrome de malformación esplénicaSíndrome BASM
itAtresia biliare associata a sindrome da malformazione splenicaSindrome BASM
nlAtresie van galwegen met malformatie van milt-syndroomBASM-syndroom
ptAtrésia biliar com síndrome de malformação esplénicaSíndrome BASM
plZespół atrezji przewodów żółciowych z malformacją śledzionyZespół BASM
csSyndrom bilaterální atrézie s malformací slezinyBASM syndrom
ukБіліарна атрезія з синдромом мальформації селезінкиСиндром BASM
zh胆道闭锁伴脾畸形综合征BASM综合征
trSplenik malformasyon sendromu ile seyreden biliyer atreziBASM sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q44.2NTBTattributedvalidated
ICD-11LB2YNTBTattributedvalidated
MONDO0016577Evalidated
UMLSC4274029Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CFC1Candidate gene tested inNot yet assessedHGNC:18292ENSG000001366986051942q21.1cryptic, EGF-CFC family member 118162845[PMID]
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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card