| A congenital hypomyelinating subtype of Charcot-Marie-Tooth disease type 4 with characteristics of Dejerine-Sottas syndrome-like phenotype (including hypotonia and/or delayed motor development in infancy), extremely slow nerve conduction velocities, potential respiratory dysfunction, cranial nerve involvement, and the typical Charcot-Marie-Tooth phenotype, for example distal muscle weakness and atrophy, sensory loss, and foot deformity. |