Understanding CMT
Charcot-Marie-Tooth disease is not one single condition. It is a large group of inherited disorders affecting the peripheral nerves—and every person’s experience is their own.
Family-led · Source-reviewed August 2026
A group of inherited peripheral neuropathies
CMT affects the nerves outside the brain and spinal cord that carry movement and sensation between the body and the nervous system.
These long nerves are especially vulnerable, so symptoms often begin in the feet and lower legs and may later involve the hands. CMT does not affect everyone in the same way or on the same timetable—even relatives with the same genetic type can have different experiences.
There is no single CMT checklist.
Common experiences can include:
- Weakness in the feet, ankles, lower legs, or hands
- Foot drop, high arches, curled toes, or other foot changes
- Balance difficulty, frequent tripping, or an unusual gait
- Reduced reflexes or reduced sensation in the feet and hands
- Fatigue, pain, cramping, or difficulty with fine-motor tasks
These signs can have many causes. A clinician—not a website—must evaluate an individual person.
Why the names can feel complicated
CMT has historically been grouped by inheritance pattern and how nerves are affected, using labels such as CMT1, CMT2, CMT4, and CMTX. Researchers and clinicians also identify CMT by the specific gene involved because many genes can lead to overlapping symptoms.
That means two people who both say “I have CMT” may have different genes, inheritance patterns, ages of onset, and care needs. Knowing the genetic diagnosis can clarify inheritance, connect families to subtype-specific research, and sometimes change medical guidance.
Our broad community began with one rare subtype.
Jack’s diagnosis is CMT4C, an autosomal-recessive form associated with changes in the SH3TC2 gene. His story is the reason this project exists, and CMT4C research—including Project Foresee—will remain a prominent part of CMT Together.
Understand CMT4CCare is built around the person.
There is no universal CMT care plan. A coordinated team can help people preserve function, participate in daily life, and respond as needs change.
Neurology and genetics
Clinical examination, family history, nerve-conduction testing, genetic testing, and genetic counseling can help identify the diagnosis and type.
Movement and mobility
Physical and occupational therapy, orthotics, mobility aids, stretching, and carefully chosen activity can support function and participation.
Feet, hands, and joints
Podiatry, orthopedics, hand care, footwear, and monitoring for contractures or skeletal changes may be part of an individual plan.
Daily life
School or workplace accommodations, fall prevention, pain and fatigue management, and emotional support can be just as important as medical appointments.
Trusted starting points
This is general educational information from a family-led project. It cannot diagnose a condition or replace advice from a neurologist, genetic counselor, therapist, orthopedist, or other qualified clinician.
What the clinical descriptions cannot show
Jack’s story follows the years before diagnosis, the adaptations afterward, and the full life that exists beyond the medical language.