PMP22 and Charcot-Marie-Tooth disease: A recent study reported that the CMT1A (PMP22), hereditary neuropathy with liability to pressure palsy/PMP22 deletion (HNPP), CMTX1 (GJB1), CMT1B (MPZ), and CMT2A (MFN2) subtypes account for 89.2% of all genetically diagnosed CMT cases [37].