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Annular epidermolytic ichthyosis
1Ronald O. Perelman Department of Dermatology, New York University, USA.
Dermatology Online Journal
|November 5, 2003
Summary
This study reports a rare case of palmoplantar keratoderma with widespread psoriasiform patches, highlighting a unique phenotype. Genetic analysis revealed mutations in keratin 1 and 10, consistent with epidermolytic hyperkeratosis.
Area of Science:
- Dermatology
- Genetics
- Histopathology
Background:
- Palmoplantar keratoderma (PPK) is a group of inherited skin disorders affecting the palms and soles.
- Epidermolytic hyperkeratosis (EH) is a subtype of ichthyosis characterized by specific histopathological findings.
- Genetic mutations in keratin genes are known causes of various keratinization disorders.
Observation:
- A 21-year-old woman presented with lifelong PPK and episodic, widespread psoriasiform skin lesions.
- Histopathological examination of skin biopsy revealed epidermolytic hyperkeratosis.
- This specific clinical presentation is exceptionally rare, documented in only seven families previously.
Findings:
- The patient's phenotype is associated with mutations in keratin 1 (KRT1) and keratin 10 (KRT10) genes.
- These genetic findings align with those observed in individuals with classic epidermolytic hyperkeratosis.
- The study identifies a specific KRT1/KRT10 mutation pattern linked to this rare PPK variant.
Implications:
- This case expands the known spectrum of KRT1/KRT10-associated genodermatoses.
- Understanding these mutations aids in accurate diagnosis and genetic counseling for rare skin conditions.
- Further research into genotype-phenotype correlations can improve management strategies for epidermolytic hyperkeratosis variants.