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Start free with EleplanCharcot-Marie-Tooth disease type 1D
ORPHA:101084Disease
Also called CMT1D
What it is
Charcot-Marie-Tooth disease type 1D (CMT1D) is a form of CMT1, caused by mutations in the EGR2 gene (10q21.1), with a variable severity and age of onset (from infancy to adulthood), that usually presents with gait abnormalities, progressive wasting and weakness of distal limb muscles, with possible later involvement of proximal muscles, foot deformity and severe reduction in nerve conduction velocity. Additional features may include scoliosis, cranial nerve deficits such as diplopia, and bilateral vocal cord paresis.
Key facts
- Age of onset
- Adolescent, Adult, Childhood, Infancy
- Inheritance
- Autosomal dominant
- Classified as
- Disease
Recorded for the broader condition
- Prevalence
- 1-5 / 10 000Charcot-Marie-Tooth disease type 1
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
Gene
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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