Dandy-Walker malformation-postaxial polydactyly syndrome

Summary

Dandy-Walker malformation-postaxial polydactyly syndrome (MONDO:0009075) is a disease. A subtype of central nervous system malformation — broader associated-gene and molecular evidence is on the parent page (see Disease family below).

At a glance

• Prevalence: <1 / 1 000 000 (Worldwide) [Orphanet-validated]
• Phenotypes (HPO): 2

Clinical features

Epidemiology

Prevalence records

2 prevalence record(s), Orphanet:

Type	Class	Value	Geography	Validation
Cases/families		5	Worldwide	Validated
Point prevalence	<1 / 1 000 000		Worldwide	Validated

Signs & symptoms

Clinical features (HPO)

2 HPO clinical features (Orphanet curated; top 2 by frequency):

HPO ID	Term	Frequency
HP:0001162	Postaxial hand polydactyly	Very frequent (80-99%)
HP:0001305	Dandy-Walker malformation	Very frequent (80-99%)

Identifiers

Disease identifiers

Field	Value
Canonical name	Dandy-Walker malformation-postaxial polydactyly syndrome
Mondo ID	MONDO:0009075
MeSH	C535771
OMIM	220220
Orphanet	1566
SNOMED CT	733094005
UMLS	C1857351
MedGen	341751
GARD	0001669
Is cancer (heuristic)	no

Also known as: DWM with postaxial polydactyly · Pierquin syndrome

Disease family

This is a subtype of central nervous system malformation. Genetic, therapeutic, and trial evidence is largely curated at the broader-term level — see the parent page for the associated-gene cohort and molecular evidence.

Classification path: disease › human disease › disease by body system or component › nervous system disorder › central nervous system malformation › Dandy-Walker malformation-postaxial polydactyly syndrome

Related subtypes (53): craniosynostosis-Dandy-Walker malformation-hydrocephalus syndrome, Aase-Smith syndrome, arachnoid cyst, facial dysmorphism-macrocephaly-myopia-Dandy-Walker malformation syndrome, cervical hypertrichosis-peripheral neuropathy syndrome, Joubert syndrome with oculorenal defect, NPHP3-related Meckel-like syndrome, orofaciodigital syndrome type 6, X-linked intellectual disability-cerebellar hypoplasia syndrome, syndromic X-linked intellectual disability Najm type, X-linked cerebral-cerebellar-coloboma syndrome syndrome, syndromic X-linked intellectual disability 5, holoprosencephaly-hypokinesia-congenital contractures syndrome, aprosencephaly cerebellar dysgenesis, Gomez-Lopez-Hernandez syndrome, PHACE syndrome, B4GALT1-congenital disorder of glycosylation, permanent neonatal diabetes mellitus-pancreatic and cerebellar agenesis syndrome, hypomyelinating leukodystrophy 8 with or without oligodontia and-or hypogonadotropic hypogonadism, pontine tegmental cap dysplasia, ataxia - intellectual disability - oculomotor apraxia - cerebellar cysts syndrome, cerebellar-facial-dental syndrome, lethal fetal cerebrorenogenitourinary agenesis/hypoplasia syndrome, autosomal recessive spinocerebellar ataxia 20, SLC39A8-CDG, severe intellectual disability-corpus callosum agenesis-facial dysmorphism-cerebellar ataxia syndrome, TELO2-related intellectual disability-neurodevelopmental disorder, isolated cerebellar vermis hypoplasia, cerebral gigantism-jaw cysts syndrome, holoprosencephaly-caudal dysgenesis syndrome, Joubert syndrome with ocular defect, macrocephaly-short stature-paraplegia syndrome, glioependymal/ependymal cyst, isolated cerebellar vermis agenesis, isolated unilateral hemispheric cerebellar hypoplasia, isolated bilateral hemispheric cerebellar hypoplasia, Hoyeraal-Hreidarsson syndrome, neural tube defect, partial corpus callosum agenesis-cerebellar vermis hypoplasia with posterior fossa cysts syndrome, X-linked intellectual disability-cerebellar hypoplasia-spondylo-epiphyseal dysplasia syndrome, tubulinopathy-associated dysgyria, global developmental delay-visual anomalies-progressive cerebellar atrophy-truncal hypotonia syndrome, rhombencephalosynapsis, Lhermitte-Duclos disease, Ritscher-Schinzel syndrome, spinal muscular atrophy-Dandy-Walker malformation-cataracts syndrome, cystic malformation of the posterior fossa, pontocerebellar hypoplasia, congenital labioscrotal agenesis-cerebellar malformation-corneal dystrophy-facial dysmorphism syndrome, childhood-onset motor and cognitive regression syndrome with extrapyramidal movement disorder, overgrowth syndrome and/or cerebral malformations due to abnormalities in MTOR pathway genes, hereditary cerebral malformation, isolated arhinencephaly

Genetics & variants

GWAS landscape

No GWAS associations recorded — common-variant (GWAS) studies don’t cover this disease (typical for Mendelian / rare diseases). See the curated gene cohort and Mendelian overlap below.

Variant details and genetic-evidence tiers

No tiered GWAS variants or ClinVar records for this disease.

Genes & proteins

No associated-gene cohort resolved for this disease. Atlas builds the molecular and therapeutic sections — associated genes, protein families, druggability, pathways, interactions, and drug associations — by aggregating over a disease’s associated genes (resolved via GWAS / GenCC / ClinVar / CIViC), and none resolved here. This is expected for antibody-mediated, autoimmune, or otherwise non-gene-defined conditions; the curated evidence for this disease is its clinical features, GWAS susceptibility, and clinical trials (above).

Function

No pathway enrichment — requires an associated-gene cohort.

Therapeutics

No druggable-target or therapeutic data for this disease’s cohort.

Clinical trials & evidence

Clinical trials

Clinical trials: 0.