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Pachyonychia congenita, type II.
1Ronald O. Perelman Department of Dermatology, New York University, USA.
Dermatology Online Journal
|November 5, 2003
Summary
Pachyonychia congenita is a rare skin condition causing nail and skin abnormalities. It is a genetic disorder linked to mutations in keratin genes.
Area of Science:
- Dermatology
- Genetics
Background:
- Pachyonychia congenita (PC) is a rare autosomal dominant genodermatosis.
- It is characterized by significant nail dystrophy, palmoplantar hyperkeratosis, and oral leukokeratosis.
Observation:
- A 5-year-old girl presented with widespread extensor hyperkeratotic papules.
- She also had subungual hyperkeratosis and nail-plate discoloration affecting all 20 nails.
- Natal teeth were reported in the patient, and a similar history was noted in the father.
Findings:
- The clinical presentation and family history were consistent with pachyonychia congenita.
- This condition is associated with mutations in keratin genes, specifically KRT6, KRT16, and KRT17.
Implications:
- Early diagnosis of pachyonychia congenita is crucial for management.
- Genetic counseling and further research into keratin gene mutations are important.
- Understanding the genetic basis aids in diagnosing and potentially treating this genodermatosis.