For CMT1A, concomitant mutations in the PMP22 gene and the Connexin32 gene (causing CMTX), the DMPK1 gene (DM1 myotonic dystrophy) and the ABCD1 gene (adrenomyeloneuropathy) have been described to produce peculiar phenotypes [34]. The gene discussed is PMP22; the disease is adrenomyeloneuropathy.