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.
It is possible to have two or more types of CMT, but the person would need mutations in two or more genes that each causes the disease. CMT is a heterogenous genetic disease, meaning mutations in different 1. Charcot-Marie-Tooth syndrome FS (E).indd 2 6/17/13 9:58 AM genes can produce similar clinical symptoms.MT also can cause curvature of the spine (scoliosis) and hip 2. Charcot-Marie-Tooth syndrome FS (E).indd 3 6/17/13 9:58 AM displacement. Many people with CMT develop contracturesâchronic shortening of muscles or tendons around joints, which prevents the joints from moving freely. Muscle cramping is common.