PMP22 and peripheral neuropathy: Mutations or genetic alterations, such as gene duplication, in PMP22 are responsible for different inherited peripheral neuropathies, among which we find Charcot–Marie–Tooth type 1A (CMT1A) hereditary neuropathy with liability to pressure palsies (HNPP) and a subtype of Dejerine–Sottas Syndrome (DSS) [68].