A heterogeneous clinical and genetic Charcot-Marie-Tooth (CMT) disease, with peripheral nerve damage resulting in chronic motor and sensory polyneuropathy, has been linked to the mutation in over a hundred genes. We report the adult onset of CMT in three siblings of an Iranian family manifesting with muscle weakness and wasting, foot drop, and pes cavus. Whole-exome sequencing (WES) identified a novel homozygous missense mutation in the