Palmoplantar keratoderma with amyotrophy.

Four members of a South African Black family who have palmoplantar keratoderma with amyotrophy are reported. No neuromuscular defects have been found and the muscle thinning appears to result from disuse atrophy. Volar hyperhidrosis, nail abnormalities and in 2 cases knuckle pads, were additional features. The condition appears to be inherited as an autosomal dominant trait. We are not aware of a similar syndrome having been previously reported.