CMT1 types have commonly been referred to as "demyelinating" and CMT2 as "axonal," which gives the impression the nature of the nerve damage between the two is fundamentally different.
A recent study published in the Journal of Clinical Investigation looked at two unrelated families with CMT2 and identified "autosomal dominant mutations of the canonical Notch ligand Jagged1 (or JAG1)" in them — a likely cause for their CMT that was also backed up by experiments in mice. The CMT News site covers this in… Continue reading Genetic Cause of CMT2 Discovered?
Here's an informative article from the Hereditary Neuropathy Foundation (HNF) about current best practices in genetic diagnosis of CMT. A lot of examples are given of people with less common subtypes who waited a long time to get properly diagnosed — sometimes after many years of wrong diagnoses or none at all. Today the best… Continue reading New genetic diagnostics for CMT