Hereditary neuropathy with liability to pressure palsies (HNPP) is a dysmyelinating polyneuropathy caused by heterozygous deletion of the peripheral myelin protein 22 (PMP22) gene.1 The clinical presentation consists of reversible, focal numbness, and weakness that may or may not be triggered by mechanical compression or repetitive limb movements. Here, PMP22 is linked to hereditary neuropathy with liability to pressure palsies.