raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:563609

Isolated anencephaly

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Multigenic/multifactorial
Age of onset
Antenatal
Status
active

This disease is described under Isolated anencephaly/exencephaly

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIsolated anencephaly
frAnencéphalie isolée
deAnenzephalie, isolierte
esAnencefalia aislada
itAnencefalia isolata
nlGeïsoleerde anencefalie
ptAnencefalia isolada
plIzolowane bezmózgowie
csIzolovaná anencefalie
ukІзольована аненцефалія
zh孤立性无脑畸形
trİzole anensefali
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q00.0NTBTspecificnot yet validated
ICD-11LA00.0Especificvalidated
MONDO0035401Evalidated
UMLSC0002902Evalidated
MedDRA10002320Evalidated

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

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MTHFRMajor susceptibility factor inAssessedHGNC:7436ENSG000001770006070931p36.22methylenetetrahydrofolate reductase31424828[PMID]
VANGL2Major susceptibility factor inAssessedHGNC:15511ENSG000001627386005331q23.2VANGL planar cell polarity protein 231424828[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

8 annotations · validated 2020-09-03
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0000835Adrenal hypoplasia
HP:0001511Intrauterine growth retardation
Occasional (29-5%)
HP:0410030Cleft lip
HP:0000776Congenital diaphragmatic hernia
HP:0009800Maternal diabetes
HP:0030244Maternal fever in pregnancy
HP:0001539Omphalocele
HP:0010516Thymus hyperplasia

Annotation source: 12210471[PMID]_7294060[PMID]_15800854[PMID]

7

Sources for this card