What are the genetic changes related to hereditary neuropathy with liability to pressure palsies ?
Mutations in the PMP22 gene cause hereditary neuropathy with liability to pressure palsies.  Hereditary neuropathy with liability to pressure palsies is caused by the loss of one copy of the PMP22 gene or alterations within the gene. The consequences of PMP22 gene mutations are not clearly understood. Most likely, PMP22 gene mutations affect myelin, the protective substance that covers nerve cells. As a result of these mutations, some of the protective myelin covering may become unstable, which leads to increased sensitivity to pressure on the nerves.