Diffuse non-epidermolytic palmoplantar keratoderma (Q85680)

Diffuse non-epidermolytic palmoplantar keratoderma (MIM #600962 ) is an autosomal dominant disorder caused by mutations in the keratin 1 gene. It presents in early childhood even, very thick, yellow hyperkeratosis over the whole of the foot and spreading later to the palms. There is a sharp cut-off at the wrist and no tendency to spread to extensor surfaces. Hyperhidrosis is usual and dermatophyte infection is common.