Olmsted Syndrome Caused by a Homozygous Recessive Mutation in TRPV3

The study identified a homozygous recessive mutation in the TRPV3 gene, specifically c.1562G>C, as a cause of a severe form of Olmsted syndrome (OS) in a 2-year-old patient of Arab Muslim origin. This mutation was associated with symptoms like painful palmoplantar keratoderma and hyperkeratotic plaques. It was not found in 250 healthy individuals or in large genetic databases, indicating its rarity and potential pathogenicity. The study concluded that OS could be inherited as an autosomal recessive trait, in addition to the previously known dominant and X-linked recessive patterns, thus broadening the understanding of its genetic basis.