raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:66631

CEDNIK syndrome

Synonyms: Cerebral dysgenesis-neuropathy-ichthyosis-palmoplantar keratoderma syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

A rare, genetic, neurocutaneous disease characterized by severe developmental abnormalities of the nervous system and aberrant differentiation of the epidermis. Patients present with a unique constellation of clinical signs described with the acronym CEDNIK: CErebral Dysgenesis, Neuropathy, Ichthyosis, and palmoplantar Keratoderma.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCEDNIK syndromeCerebral dysgenesis-neuropathy-ichthyosis-palmoplantar keratoderma syndrome
frSyndrome CEDNIKSyndrome de dysgénésie cérébrale-neuropathie-ichtyose-kératodermie palmoplantaire
deCEDNIK-SyndromZerebrale Dysgenesie-Neuropathie-Ichthyose-Palmoplantarkeratose-Syndrom
esSíndrome CEDNIKSíndrome de disgenesia cerebral-neuropatía-ictiosis-queratodermia palmoplantar
itSindrome CEDNIKSindrome disgenesia cerebrale-neuropatia-ittiosi-cheratoderma palmoplantare
nlCEDNIK-syndroomCerebrale dysgenesie - neuropathie - ichthyosis - keratodermie van handpalm of voetzool-syndroom · Cerebrale dysgenesie - neuropathie - ichthyosis - palmoplantaire keratodermie-syndroom
ptSíndrome CEDNIKSíndrome de disgenesia cerebral-neuropatia-ictiose-queratodermia palmo-plantar
plZespół CEDNIKZespół dysgenezja mózgu-neuropatia-rybia łuska rogowiec dłoni i stóp
csCEDNIK syndromSyndrom zahrnující cerebrální dysgenezi, neuropatii, ichtiózu a palmoplantární keratoderma
ukСиндром CEDNIKСиндром церебрального дисгенезу - невропатії - іхтіозу - долонно-підошовної кератодермії
zhCEDNIK综合征大脑发育不全-神经病-鱼鳞病-掌跖角化综合征
trCEDNIK sendromuSerebral disgenezi-nöropati-iktiyoz-palmoplantar keratoderma sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM609528Evalidated
ICD-10Q82.8NTBTattributedvalidated
ICD-11LD27.2NTBTindexvalidated
MONDO0012290Evalidated
MeSHC537943Evalidated
UMLSC1836033Evalidated
GARD9940Evalidated

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.

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Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SNAP29Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:11133ENSG0000009994060420222q11.21synaptosome associated protein 2915968592[PMID]_21073448[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families13 casesWorldwideCase(s)Validated25958742[PMID]
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.

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HPO phenotypes

33 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001251Ataxia
HP:0007447Diffuse palmoplantar kyperkeratosis
HP:0000494Downslanted palpebral fissures
HP:0001263Global developmental delay
HP:0000316Hypertelorism
HP:0008064Ichthyosis
HP:0001249Intellectual disability
HP:0000276Long face
HP:0000252Microcephaly
HP:0002421Poor head control
HP:0000426Prominent nasal bridge
Frequent (79-30%)
HP:0001273Abnormal corpus callosum morphology
HP:0000496Abnormality of eye movement
HP:0003134Abnormality of peripheral nerve conduction
HP:0001284Areflexia
HP:0000648Optic atrophy
HP:0001302Pachygyria
HP:0009830Peripheral neuropathy
HP:0002126Polymicrogyria
Occasional (29-5%)
HP:0000164Abnormality of the dentition
HP:0000478Abnormality of the eye
HP:0000504Abnormality of vision
HP:0001635Congestive heart failure
HP:0000457Depressed nasal ridge
HP:0000268Dolichocephaly
HP:0000135Hypogonadism
HP:0000400Macrotia
HP:0000100Nephrotic syndrome
HP:0000093Proteinuria
HP:0001250Seizure
HP:0000407Sensorineural hearing impairment
HP:0004322Short stature
HP:0001297Stroke

Run the differential on the 11 obligate / very frequent terms

Annotation source: 15968592[PMID]

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Sources for this card