A neuropathy characterized by progressive weakness, particularly of the legs with onset in infancy. Severe pains occurs in the hands and feet, aggravated by heat, hot weather or FEVER; MUSCULAR ATROPHY and sensory loss also occur. BIOPSY reveals tomaculous (sausage shaped) swellings affecting the nerve MYELIN SHEATHS. Autosomal recessive inheritance is suspected. OMIM: 256870