raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:727719

Monoamine oxidase A and monoamine oxidase B deficiency

Synonyms: Monoamine oxidase A and monoamine oxidase B deletion syndrome · MAOA/B deletion syndrome · MAOA/B deficiency

Type
Disease
Group
Disorder
Inheritance
X-linked recessive
Age of onset
Childhood, Infancy
Status
active

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enMonoamine oxidase A and monoamine oxidase B deficiencyMonoamine oxidase A and monoamine oxidase B deletion syndrome · MAOA/B deletion syndrome · MAOA/B deficiency
frDéficit en monoamine oxydase A et monoamine oxydase BSyndrome de délétion de la monoamine oxydase A et la monoamine oxydase B · Syndrome de délétion MAOA/B · Déficit MAOA/B
deMonoaminoxidase-A- und Monoaminoxidase-B-MangelMAOA/B-Mangel · Monoaminoxidase-A- und Monoaminoxidase-B-Deletionssyndrom · MAOA/B-Deletionssyndrom
esDeficiencia de monoaminooxidasa A y monoaminooxidasa BDeficiencia de MAOA/B · Síndrome de deleción de MAOA/B · Síndrome de deleción de monoaminooxidasa A y monoaminooxidasa B
itDeficit di monoamino ossidasi A e monoamino ossidasi BDeficit di MAOA/B · Sindrome da delezione di MAOA/B · Sindrome da delezione di monoamino ossidasi A e monoamino ossidasi B
nlDeficiëntie van monoamineoxidase A en monoamineoxidase BMAOA/B-deletiesyndroom · Monoamineoxidase A en monoamineoxidase B-deletiesyndroom
ptMonoamine oxidase A and monoamine oxidase B deficiency
plMonoamine oxidase A and monoamine oxidase B deficiency= en
csMonoamine oxidase A and monoamine oxidase B deficiency= en
2

Cross-references

qualifier = Orphanet mapping relation

No cross-references in this release.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (3):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MAOARole in the phenotype ofAssessedHGNC:6833ENSG00000189221309850Xp11.3monoamine oxidase A23414621[PMID]
MAOBRole in the phenotype ofAssessedHGNC:6834ENSG00000069535309860Xp11.3monoamine oxidase B23414621[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)ValidatedORPHANET
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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