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Is Charcot-Marie-Tooth Disease Genetic?
Is Charcot-Marie-Tooth Disease hereditary? Here's what the research says about inherited risk.
- Heritability
- ~100%
- Inheritance
- autosomal-dominant
- Key genes
- PMP22,MPZ,GJB1,MFN2
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CMT is the most common inherited peripheral neuropathy affecting the peripheral nerves controlling movement and sensation. Multiple subtypes with different inheritance patterns exist.
How Genetic Is Charcot-Marie-Tooth Disease?
Charcot-Marie-Tooth Disease has a strong genetic basis. Research estimates heritability at approximately 100%, meaning genetic factors account for the majority of variation in whether individuals develop this condition.
Key genes associated with Charcot-Marie-Tooth Disease: PMP22,MPZ,GJB1,MFN2. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: MedlinePlus Genetics
Does Family History Matter for Charcot-Marie-Tooth Disease?
Yes — family history is one of the strongest predictors of Charcot-Marie-Tooth Disease. If a first-degree relative (parent, sibling, or child) has been diagnosed, your own risk may be significantly elevated. Discussing your family history with a healthcare provider or genetic counsellor is strongly recommended.
Frequently Asked Questions
Is Charcot-Marie-Tooth Disease genetic?
This condition has a strong genetic basis. Studies suggest heritability of approximately 100%. Key genes involved include PMP22,MPZ,GJB1,MFN2.
Can a DNA test reveal my risk of Charcot-Marie-Tooth Disease?
Genetic testing can identify relevant variants, though Charcot-Marie-Tooth Disease risk is influenced by many factors. Talk to your doctor about appropriate testing.
Does family history matter for Charcot-Marie-Tooth Disease?
Yes — family history is one of the strongest predictors of Charcot-Marie-Tooth Disease. If a first-degree relative has been diagnosed, your own risk may be significantly elevated.
Is Charcot-Marie-Tooth Disease hereditary, meaning it's passed directly from parent to child?
Charcot-Marie-Tooth Disease follows a autosomal-dominant inheritance pattern in cases with a clear genetic cause, though not every case is inherited directly from a parent — some arise from new (de novo) mutations or a combination of genetic and environmental factors.
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- MedlinePlus Genetics
- MedlinePlus Genetics — National Library of Medicine
- CDC Genomics and Precision Health
Last updated: · Reviewed by the 247GeneticCheck editorial team
Content compiled with reference to peer-reviewed genetics literature and testing-provider documentation. This site does not provide medical or genetic counselling advice — always consult a healthcare professional or genetic counsellor before acting on DNA test results.
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