What Is the Life Expectancy for Charcot-Marie-Tooth?

For the vast majority of people with Charcot-Marie-Tooth disease (CMT), life expectancy is completely normal ^[1]. CMT is not a fatal disease. Instead, it is a chronic condition that slowly progresses over decades, primarily affecting the peripheral nerves that control muscle movement and carry sensory information from the arms and legs.

Most individuals with CMT can expect to live as long as someone without the condition. The focus of CMT care is usually on maintaining mobility, managing symptoms (such as foot deformities or nerve pain), and improving quality of life, rather than extending lifespan.

The Most Common Form: CMT1A

The most frequently diagnosed form of the disease is CMT type 1A (CMT1A). If you have been diagnosed with this type, you can be reassured that it is generally not associated with a shortened life expectancy compared to the general population ^[1][2].

People with CMT1A and other common types typically experience a gradual weakening of the muscles in the feet, lower legs, hands, and forearms. This often leads to physical changes like high arches or hammertoes. While these changes can be challenging and may eventually require assistive devices like braces or walking aids, they do not directly threaten your life. Genetic testing can help confirm your specific CMT subtype and provide more certainty about your prognosis.

Rare Severe and Early-Onset Forms

While standard forms of CMT do not impact lifespan, there are a few very rare exceptions. Some specific, less common types of the disease can cause severe symptoms that may sometimes affect life expectancy:

• Early-Onset Forms: Conditions such as Dejerine-Sottas syndrome (a severe, early-onset form of CMT) begin in infancy or early childhood and can cause significant health complications early in life ^[3].
• Specific Genetic Variants: Certain very rare types of CMT, such as some forms of CMT4 linked to specific gene mutations, can involve multiple body systems and cause severe issues ^[4][5][6]. Genetic counseling can help you understand your specific risks and family planning options.
• Breathing Complications: In very rare instances, severe forms of CMT can lead to respiratory insufficiency (difficulty breathing). This can occur due to weakness in the vocal cords or the diaphragm (the main muscle used for breathing) ^[7][8][9].

Even in more typical cases of CMT, it is possible (though uncommon) to develop breathing issues resulting from respiratory muscle weakness or spinal curvature ^[9][10][11]. Symptoms to watch for include shortness of breath, particularly when lying flat. Additionally, sleep apnea (breathing repeatedly stopping and starting during sleep) can occur, but it is highly treatable.

Living Well With CMT

Because CMT does not typically alter how long you will live, the goal is to live as well as possible. Working with a neurologist, physical therapist, and occupational therapist can help you manage weakness, address pain, protect your joints, and maintain your independence for as long as possible. Regular check-ups to monitor joint health and breathing function are important parts of proactive, ongoing care.