Abstract
Charcot-Marie-Tooth (CMT) disorders are inherited peripheral neuropathies and are among the most common genetic neurological disorders, with a prevalence of 1 in 2400 individuals.1 Charcot-Marie-Tooth disease type 1A (CMT1A) is caused by a 1.4-megabase duplication on chromosome 17p11.22,3 and constitutes approximately 50% of all cases of CMT.4,5 The peripheral myelin protein 22 gene (PMP22; GenBank AC005703) is contained within the duplication, and the increased level of PMP22 causes the neuropathy.6