raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:726703

Polydactyly-macrocephaly syndrome

Synonyms: MAX-related polydactyly-macrocephaly syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Antenatal, Infancy, Neonatal
Status
active

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enPolydactyly-macrocephaly syndromeMAX-related polydactyly-macrocephaly syndrome
frSyndrome de polydactylie-macrocéphalieSyndrome de polydactylie-macrocéphalie associé à MAX
dePolydaktylie-Makrozephalie-SyndromMAX-assoziiertes Polydaktylie-Makrozephalie-Syndrom
esSíndrome de polidactilia-macrocefaliaSíndrome de polidactilia-macrocefalia asociado al gen MAX
itSindrome polidattilia-macrocefaliaSindrome polidattilia-macrocefalia correlata a MAX
nlPolydactylie - macrocefalie-syndroomMAX-gerelateerd polydactylie - macrocefalie-syndroom
ptPolydactyly-Macrocephaly Syndrome
plPolydactyly-macrocephaly syndrome= en
csPolydactyly-macrocephaly syndrome= en
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM620712Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MAXDisease-causing germline mutation(s) inAssessedHGNC:6913ENSG0000012595215495014q23.3MYC associated transcriptional regulator X38141607[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families6 casesWorldwideCase(s)Validated38141607[PMID]_40799178[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated38141607[PMID]_40799178[PMID]_ORPHANET

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