Other genes potentially involved in the phenotype include: PMP22, which is linked to certain hereditary neuropathies of the Charcot Marie Tooth type (CMT) or hereditary neuropathy with liability to pressure palsy (HNPP); TNFRSF13B, which may cause immunodeficiency related to IgA deficiency; and MYO15A, which may cause hypoacousia [8–10]. Here, PMP22 is linked to hereditary neuropathy with liability to pressure palsies.