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CEDNIK syndrome is a neurocutaneaous syndrome characterized by severe developmental abnormalities of the nervous system and aberrant differentiation of the epidermis.
Features include always present findings: Poor head control, Failure to thrive, Hypertelorism, and Cortical dysplasia and others; and common findings: Aspiration pneumonia. 24 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 6 | Polyneuropathy, Severe intellectual disability, Intellectual disability |
SNAP29 function has not been fully characterized.
CEDNIK syndrome is associated with mutations in the SNAP29 gene on chromosome 22.
Genetic testing for SNAP29 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for CEDNIK syndrome has been reported in the published literature.
Phenotype severity distribution: 15 always present features, 1 common feature.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for CEDNIK syndrome.
5 publications have been identified in PubMed for CEDNIK syndrome. Research spans Case Report / Case Series (60%), Diagnostic / Biomarker (20%), and Review / Meta-Analysis (20%).
Sidorina A (2026). [PMID: 41429203](https://pubmed.ncbi.nlm.nih.gov/41429203/). *J Lipid Res*. [Diagnostic / Biomarker]
Fuad N (2025). [PMID: 40709160](https://pubmed.ncbi.nlm.nih.gov/40709160/). *Cureus*. [Case Report / Case Series]
Wu R (2025). [PMID: 41404470](https://pubmed.ncbi.nlm.nih.gov/41404470/). *Front Neurol*. [Review / Meta-Analysis]
Potesta MA (2024). [PMID: 38826968](https://pubmed.ncbi.nlm.nih.gov/38826968/). *Cureus*. [Case Report / Case Series]
Bijarnia-Mahay S (2024). [PMID: 38443713](https://pubmed.ncbi.nlm.nih.gov/38443713/). *Indian J Pediatr*. [Case Report / Case Series]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 9:38 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about CEDNIK syndrome
Head and neck
2 |
Progressive microcephaly, Long face |
Skin | 2 | Dry, scaly skin (ichthyosis), Palmoplantar keratoderma |
Muscles | 1 | Low muscle tone (hypotonia) |
Lungs and breathing | 1 | Aspiration pneumonia |
Growth and development | 1 | Failure to thrive |
Eyes | 1 | Optic disc hypoplasia |
Ears | 1 | Inner ear hearing loss (sensorineural hearing impairment) |
Age of onset: infancy.