Perinatal. Referring to the period of time surrounding an infant's birth, from the last two months of pregnancy to the first 28 days of life. The TORCH panel tests for perinatal infections.
1 CMT1 is commonly caused by a duplication of a gene on chromosome 17. This gene controls the production of your nervesâ protective myelin sheath. CMT1 is also caused by other gene defects.  CMT2 results from a defect in your peripheral nerve cellsâ axon. This is caused by a defect in your mitofusin 2 gene.
CMT is a genetic disease-it is an inherited disease. It is caused by inherited mutated genes that are involved in producing substances (proteins) which affect either the axon or myelin sheath of the peripheral nerve.In all cases of CMT, several mutated genes are involved in causing the condition (not just one).s CMT is a hereditary disease, people who have close family members with CMT have a higher risk of developing the condition themselves. Understanding how the periphery nerves function is important if you want to have a better appreciation of what causes CMT.