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.
Mutations in the APC gene are also responsible for a disorder called Turcot syndrome, which is closely related to familial adenomatous polyposis. Turcot syndrome is an association of colorectal cancer with a type of cancerous brain tumor called a medulloblastoma.everal mutations in the APC gene have been found in people with a type of aggressive but noncancerous (benign) growth called a desmoid tumor. These rare tumors arise from connective tissue, which provides strength and flexibility to structures such as bones, ligaments, and muscles.