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Living with CEDNIK syndrome

A rare genetic condition that affects how the brain and skin develop, with nerve and skin problems.

Understanding CEDNIK syndrome

CEDNIK syndrome is a rare genetic disease that affects the nervous system and the skin.

The name stands for CErebral Dysgenesis, Neuropathy, Ichthyosis, and palmoplantar Keratoderma. That means the brain develops abnormally, nerves are affected, and the skin is dry and scaly with thickened skin on the palms and soles. It starts in the newborn and infant years.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Small head (microcephaly)
  • Thick skin on palms and soles
  • Poor balance and coordination (ataxia)
  • Absent tendon reflexes
  • Eye movement problems
  • Brain with fewer, broader folds (pachygyria)

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists, genetic specialists and skin, hair, and nail specialists.

  3. Consider genetic testing

    Changes in SNAP29 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Foundation for Ichthyosis and Related Skin Types may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists); Skin, hair, and nail specialists (dermatologists)
Expert care
Expert lists: Foundation for Ichthyosis and Related Skin Types
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Foundation for Ichthyosis and Related Skin Types and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Can SNAP29 genetic testing confirm the diagnosis?
Which therapies can help with movement and development?
How should the skin symptoms be cared for?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesSNAP29

Changes in the SNAP29 gene cause this condition. It is inherited in an autosomal recessive way, so a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalSkin

Also known as: cednik (cerebral dysgenesis, neuropathy, ichthyosis, keratoderma) syndrome; cerebral dysgenesis-neuropathy-ichthyosis-palmoplantar keratoderma syndrome; cerebral dysgenesis, neuropathy, ichthyosis and keratoderma syndrome; cerebral dysgenesis, neuropathy, ichthyosis, and palmoplantar keratoderma; cerebral dysgenesis, neuropathy, ichthyosis, and palmoplantar keratoderma syndrome; cerebral dysgenesis, neuropathy, ichthyosis, palmoplantar keratoderma syndrome

Patient organizations

Source: NIH GARD · CEDNIK syndromeGARD ID 9940 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with CEDNIK syndrome.

Explore the CEDNIK syndrome blog

Explore research for CEDNIK syndrome

Explore actively recruiting CEDNIK syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for CEDNIK syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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