PMP22 and Charcot-Marie-Tooth disease type 1A: The second most common gene with pathogenic findings detected by SV-analysis was PMP22, seen in eight patients with Charcot–Marie-Tooth type 1A (CMT1A, OMIM #118220) and one patient with neuropathy, hereditary, with liability to pressure palsies (HNPP, OMIM #162500).