[Autosomal-dominant motor-sensory neuropathy type I: intrafamilial polymorphism in the Roussy-Lévy syndrome]

A family is described in which 12 members in 3 generations suffered from hereditary type 1 motor-sensory neuropathy. Clinical and neurophysiological data allowed to regard the disease in 8 patients as a variant of Roussy-Lévy syndrome. Intrafamilial clinical polymorphism and differential diagnosis of the disease are discussed.