CMT2
CMT2 is the traditional label for axonal CMT, with motor nerve conduction velocities above about 45 m/s. Many different genes cause it. More in the glossary
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Plain-Language Research Summary: A Blood Test for Nerve-Fibre Loss in CMT
A 2025 study found the nerve-damage protein NfL more than twice as high in the blood of people with CMT, and loosely linked to severity. What it shows, what it can’t, and how it fits with earlier studies.
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Name Games: Why CMT Type Names Are a Mess, and How to Find Reliable Information
CMT’s type names grew out of nerve tests and a run of lettered genes. They no longer line up. Here is how the naming got this messy, where it is heading, and which sources to trust.
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Differential Diagnosis with Dr. ChatGPT in the House
In a matter of seconds, ChatGPT reviewed and confirmed the findings of three neurologists and a genetic counselor that took me six years to gather. It also suggested a new diagnostic path that was only vaguely hinted at by the human diagnosticians.
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The “First Treatable CMT Disease” is Neither CMT Nor a Disease
CMT-related research may truly do away with CMT disease first by eliminating or updating how naming and classification works in neurological pathology.
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The “first treatable” form of CMT?
I wrote this brief article on the way the SORD gene works (or fails to work) for the Hereditary Neuropathy Foundation. SORD mutations cause “the most common autosomal recessive form of CMT2 (CMT2A1), autosomal recessive intermediate CMT (CMTRIA), and the overlapping category of distal hereditary motor neuropathy (dHMN).”
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All types of CMT are “Axonal”
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.
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The Problem With Writing About CMT
I’ve been increasingly irritated lately by US-based CMT-related non-profit organizations that seem to compete with each other for donations — supposedly they drive research for “treatments and cures.” How well they actually do this relative to the padding of their own budgets is a good question I might take up down the line, but you…
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CMT Blogs of Note
A refreshed directory of independent CMT, neuromuscular, chronic-pain, and disability-justice blogs and newsletters, checked October 2026.
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A New Genetic Cause of a Previously Unknown Subtype of CMT2
Published in Nature Genetics last month, the INC group’s findings are a big deal, and there is a really cool story from the University of Miami’s Miller School of Medicine about how the research team came together.
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New Study of Genetic Causes of CMT Needs Participants
The Rare Diseases Network is looking for participants in a new study looking for unknown causes of the most common types of CMT.
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Genetic Cause of CMT2 Discovered?
A 2020 study linked JAG1 mutations to axonal CMT2 in two families. Updated in 2026: JAG1-related CMT now has its own OMIM entry, CMT2HH.
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CMT and Respiratory Dysfunction
Science is starting to confirm very wide ranging effects to the nerve damage CMT does, often slowly and over time so it may not be very noticeable for many years.