Woolly hair-palmoplantar keratoderma…

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Woolly hair-palmoplantar keratoderma syndrome

ORPHA:420686Disease

Also called KWWH type IV · Keratoderma with woolly hair type IV · Woolly hair-palmoplantar hyperkeratosis syndrome

What it is

Woolly hair-palmoplantar keratoderma syndrome is a very rare, hereditary epidermal disorder characterized by hypotrichosis/woolly scalp hair, sparse body hair, eyelashes and eyebrows, leukonychia, and striate palmoplantar keratoderma (more severe on the soles than the palms), which progressively worsens with age. Pseudo ainhum of the fifth toes was also reported. Although woolly hair-palmoplantar keratoderma syndrome shares clinical similarities with both Naxos disease and Carvajal syndrome, cardiomyopathy is notably absent.

Key facts

Prevalence
<1 / 1 000 000
Age of onset
Childhood, Infancy, Neonatal
Inheritance
Autosomal recessive
Classified as
Disease

Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.

Gene

KANK2Disease-causing germline mutation(s)

ICD-10 codes

Q82.8filed under a broader ICD-10 category — shared with 106 other rare diseases

ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.

Related health topics

Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.

Cross-references

MONDO 0014492OMIM 616099UMLS C4706686

Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.

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