E114G de Novo Mutation in GJB2 Gene in a Chinese Patient with Classical Vohwinkel Syndrome

Vohwinkel syndrome (VS) is a rare autosomal dominant form of palmoplantar keratoderma (PPK), characterized by diffuse hyperkeratosis of the palms and soles, starfish-shaped keratotic lesions, and pseudo-ainhum. Mutations in GJB2 have been implicated in VS pathogenesis. In this study, Sanger sequencing of the GJB2 coding exons and exon-intron boundaries was performed in a Chinese patient with VS. A missense mutation c.341A>G (E114G) was also identified. This finding expands the mutational spectrum of VS and provides further insight into its genetic basis, which may facilitate improved genetic screening and counseling of affected families.