Charcot-Marie-Tooth disease type 1C is a rare inherited nerve condition that mainly affects the feet, legs, hands, and lower arms. It often begins in childhood, the teen years, or early adulthood, and people with Charcot-Marie-Tooth disease type 1C may notice weakness, foot drop, high arches, balance problems, or hand weakness. The early symptoms of Charcot-Marie-Tooth disease type 1C can be mild at first, so some people mainly notice frequent tripping, trouble running, or difficulty with buttons and jars. Not everyone will have the same experience, but Charcot-Marie-Tooth disease type 1C is usually lifelong and slowly progressive, and many living with it have a normal life span. Treatment for Charcot-Marie-Tooth disease type 1C focuses on managing symptoms with physical therapy, braces or shoe supports, exercise guidance, pain care when needed, and sometimes occupational therapy or genetic counseling.
How many people live with Charcot-marie-tooth disease type 1c?
There is no widely accepted separate count for how many people are living with Charcot-Marie-Tooth disease type 1C worldwide or in the United States. For context, Charcot-Marie-Tooth disease as a whole affects about 2.8 million people worldwide (Charcot-Marie-Tooth Association, 2024) and about 150,000 people in the United States (Charcot-Marie-Tooth Association, 2024), but type 1C is a very rare subtype and a reliable estimate for it on its own is not available.
Overview
Charcot-marie-tooth disease type 1cSymptoms
Charcot-Marie-Tooth disease type 1C usually causes slowly worsening weakness and numbness in the feet and lower legs, often with high arches or hammertoes. Early symptoms of Charcot-Marie-Tooth disease type 1C can include frequent ankle sprains, tripping, and trouble with balance.
Outlook and prognosis
Charcot-Marie-Tooth disease type 1C usually progresses slowly, and many people remain mobile and independent for years. Symptoms often start in the feet and legs, and life expectancy is usually typical, though day-to-day limitations can gradually increase.
Causes and risk factors
Charcot-Marie-Tooth disease type 1C comes from an inherited LITAF gene change, though it sometimes starts new in a child. Family history is the main risk factor. Lifestyle and environmental factors do not cause it, but may worsen symptoms.
Genetic influences
Genetics are central to Charcot-Marie-Tooth disease type 1C, because it is caused by an inherited change in a specific gene. Different genetic variations can affect how early symptoms of Charcot-Marie-Tooth disease type 1C begin and how severe they become.
Diagnosis
Charcot-Marie-Tooth disease type 1C is usually diagnosed from clinical features such as slowly worsening foot weakness, balance problems, and reduced reflexes. The diagnosis of Charcot-Marie-Tooth disease type 1C is confirmed with genetic tests, sometimes alongside nerve studies.
Treatment and drugs
Charcot-Marie-Tooth disease type 1C is treated with physical therapy, stretching, and ankle-foot braces to support walking and help prevent falls. Some people also benefit from pain treatment, occupational therapy, and sometimes foot surgery for severe deformities.
Symptoms
Walking longer distances, climbing stairs, or keeping your footing on uneven ground can become harder for many living with Charcot-Marie-Tooth disease type 1C. Early features of Charcot-Marie-Tooth disease type 1C often involve the feet and lower legs, with weakness, high arches, and reduced feeling becoming noticeable over time. Features vary from person to person and can change over time. Some people also notice frequent tripping, foot shape changes, or later weakness in the hands.
Weakness in the feet and ankles can make it hard to lift the front of the foot when walking. Many living with Charcot-Marie-Tooth disease type 1C start to trip more often, especially on curbs, stairs, or uneven ground.
Feeling in the feet and lower legs may be reduced, including touch, vibration, pain, or temperature. This can make it harder to notice a blister, judge where your foot is placed, or keep steady in the dark.
Many people with Charcot-Marie-Tooth disease type 1C develop high arches, curled toes, or both. Shoes may fit poorly, pressure spots can build up, and walking can become less comfortable over time.
Balance can be off because the feet are weaker and the nerves send less reliable position signals to the brain. For many, this means wobbling on uneven paths or needing to watch the ground more closely.
How people usually first notice Charcot-marie-tooth disease type 1c?
The first signs of Charcot-Marie-Tooth disease type 1C are often noticed in childhood or the teen years, when a child seems clumsier than expected, trips often, has trouble running, or starts to develop high arches or hammertoes. Families and doctors may also notice frequent ankle sprains, weakness in the feet and lower legs, and reduced reflexes, while some people with Charcot-Marie-Tooth disease type 1C gradually begin to feel numbness or tingling in the feet. Because this condition usually progresses slowly, it is often first recognized as a pattern over time rather than one sudden warning sign.
Types of Charcot-marie-tooth disease type 1c
No distinct types of Charcot-Marie-Tooth disease type 1C are widely recognized.
Can I slow down the onset of symptoms?
For Charcot-Marie-Tooth disease type 1C, there is no proven way to meaningfully delay when symptoms start, because this is an inherited nerve condition and current treatments do not stop it from beginning. Research has not shown that exercise, diet, supplements, or other lifestyle changes can prevent or clearly postpone onset, although staying active, not smoking, limiting alcohol, getting enough sleep, and keeping blood sugar under good control may support overall nerve and muscle health and can help with day-to-day function once symptoms appear. There is no preventive medicine for type 1C, but early care with a nerve specialist and physical therapy can help track changes, protect foot and leg function, and support mobility, which can still make a real difference even if it cannot promise a later onset.
What genetics can tell you about symptoms
Genetics can give some clues about symptoms in Charcot-Marie-Tooth disease type 1C, but it usually cannot predict the exact day-to-day experience for one person. People with the same gene change can still have different patterns of weakness, foot problems, balance trouble, numbness, or pain, and genetics may partly influence how early symptoms begin and how severe they become. In general, this condition tends to affect the outer nerves gradually over time, but other inherited factors and life circumstances can also shape how symptoms show up.
Causes and risk factors
In people with Charcot-Marie-Tooth disease type 1C, the underlying cause is usually a change in the LITAF gene, which affects the cells that protect nerves. This change is often inherited from a parent, but it can also happen for the first time in a child. If you have a family history of Charcot-Marie-Tooth disease type 1C, your chance of having it is higher, although risk can vary widely from person to person. Other genes and age can influence when symptoms begin and how much weakness or numbness develops. Diabetes, heavy alcohol use, and some nerve-damaging medicines do not cause Charcot-Marie-Tooth disease type 1C, but they may make symptoms worse.
What are the most common causes or risk factors?
Charcot-Marie-Tooth disease type 1C is usually caused by a change in a gene called LITAF, which affects the protective coating around nerves and is most often passed down from a parent. The biggest risk factor is having a parent or other close family member with the condition, although sometimes it can happen because of a new gene change in someone with no family history. There are no known lifestyle causes, but other problems that can damage nerves, such as diabetes, heavy alcohol use, or some medicines, may make symptoms worse.
Environmental and biological risk factors
For people searching for environmental and biological risk factors for Charcot-Marie-Tooth disease type 1C, the key point is that very few have been confirmed. Doctors often group risks into internal (biological) and external (environmental). In Charcot-Marie-Tooth disease type 1C, current evidence does not show a clear role for outside exposures or common body-based factors in causing the condition.
Research has not identified toxins, air pollution, infections, or radiation as established causes of Charcot-Marie-Tooth disease type 1C. These exposures can affect nerve health in general, but they are not known to make this specific condition occur.
Problems during pregnancy or around birth have not been linked in a consistent way to Charcot-Marie-Tooth disease type 1C. This means issues such as maternal illness, premature birth, or delivery complications are not established risk factors.
Charcot-Marie-Tooth disease type 1C is not known to occur more often because of sex, race, or usual age-related body changes. Symptoms may begin at different ages, but timing of symptoms is not the same as a risk factor for the condition itself.
Genetic risk factors
When families ask about the genetic causes of Charcot-Marie-Tooth disease type 1C, the answer usually centers on a change in the LITAF gene. This condition is most often passed down in families in a dominant inheritance pattern, so one changed copy can be enough to cause it. Some risk factors are inherited through our genes. Symptoms can still vary quite a bit, even among relatives with the same genetic change.
LITAF gene: Most cases of Charcot-Marie-Tooth disease type 1C are caused by a harmful change in the LITAF gene. This change affects the outer covering of peripheral nerves, which can make nerve signals travel less well over time.
Dominant inheritance: Charcot-Marie-Tooth disease type 1C usually runs in families in a dominant pattern. That means inheriting one changed copy of the gene can be enough to develop the condition.
Affected parent: If one parent carries the LITAF change, each child has a 1 in 2, or 50%, chance of inheriting it. People with the same family change can still have milder or more noticeable symptoms.
Family history: A family history of similar nerve problems raises the chance that Charcot-Marie-Tooth disease type 1C is inherited in the family. This is especially suggestive when symptoms appear in more than one generation.
New gene change: In some people, the gene change happens for the first time in them instead of being inherited from a parent. These new changes are believed to be less common than inherited cases.
Lifestyle risk factors
Charcot-Marie-Tooth disease type 1C is an inherited neuropathy, so lifestyle habits do not cause it. However, how lifestyle affects Charcot-Marie-Tooth disease type 1C can matter for weakness, balance, foot problems, fatigue, pain, and day-to-day function. The most helpful focus is on habits that protect nerves, muscles, joints, and mobility over time.
Regular, low-impact exercise can help maintain muscle strength, endurance, balance, and walking ability in Charcot-Marie-Tooth disease type 1C. Long periods of inactivity can worsen deconditioning and make weakness and fatigue more limiting.
Repeated high-impact activity or pushing through marked fatigue can aggravate foot pain, joint strain, and recovery time when muscles are already weak. Pacing activity and allowing rest may help preserve function without triggering symptom flare-ups.
Excess body weight places more stress on weak ankle and foot muscles and can worsen instability, pain, and difficulty walking. Maintaining a healthy weight may reduce strain on joints and make braces, footwear, and mobility aids work better.
Poorly fitting shoes can increase pressure points, tripping risk, ankle instability, and skin injury in feet affected by deformity or sensory loss. Supportive, well-fitted footwear may improve safety and comfort and help prevent ulcers or calluses.
Risk prevention
Charcot-Marie-Tooth disease type 1C cannot usually be prevented because it is an inherited nerve condition present from birth, even if symptoms show up later. For many living with Charcot-Marie-Tooth disease type 1C, prevention is really about lowering the chance of falls, foot problems, pain, and loss of function over time. Prevention is flexible—it adapts to your life and health background. Regular follow-up can help catch early symptoms of Charcot-Marie-Tooth disease type 1C and treat complications sooner.
If Charcot-Marie-Tooth disease type 1C runs in your family, genetic counseling can help you understand the chance of passing it on. It can also explain testing options before pregnancy or during family planning.
Regular, guided exercise can help maintain strength, balance, and joint movement in people with Charcot-Marie-Tooth disease type 1C. A physical therapist can tailor a plan so activity protects function without overstraining weak muscles.
Well-fitted shoes, ankle braces, or custom inserts can improve stability and reduce falls. These supports may also lower the risk of pressure sores, ankle sprains, and worsening foot shape changes.
Clearing loose rugs, improving lighting, and using handrails can make daily movement safer. If tripping on curbs or stairs is becoming common, an occupational or physical therapist can suggest practical home changes.
Can you prevent Charcot-marie-tooth disease type 1c?
No, Charcot-Marie-Tooth disease type 1C usually cannot be prevented, because it is an inherited condition caused by a change in a gene that affects the nerves. If it runs in your family, meeting with a genetics specialist before pregnancy can help you understand the chance of passing it on, but it cannot prevent the condition in someone who already has it.
Transmission
Charcot-Marie-Tooth disease type 1C is not contagious, so it cannot be caught from another person through touch, the air, sex, food, or blood. Instead, the genetic transmission of Charcot-Marie-Tooth disease type 1C usually happens when a parent passes down a changed gene to a child.
In many families, Charcot-Marie-Tooth disease type 1C follows an autosomal dominant pattern, which means each child has a 1 in 2, or 50%, chance of inheriting it if one parent carries the gene change. Sometimes the gene change begins for the first time in the affected child, so there may be no earlier family history, and symptoms can vary even within the same family.
When to test your genes
Genetic testing is most useful if you or close relatives have slowly progressive foot weakness, high arches, frequent ankle sprains, numbness, or nerve studies suggesting demyelinating Charcot-Marie-Tooth disease. It can confirm CMT1C, guide family planning, and help tailor supportive care such as physical therapy, bracing, and avoiding nerve-toxic medications.
Diagnosis
Charcot-Marie-Tooth disease type 1C is usually diagnosed when a pattern of slowly worsening nerve problems starts to come together, such as frequent ankle sprains, foot weakness, high arches, or trouble with fine hand tasks. The diagnosis often combines a neurologic exam with nerve testing and genetic testing, rather than relying on one finding alone. Getting a diagnosis is often a turning point toward answers and support.
Doctors ask about symptoms such as foot drop, balance problems, numbness, cramping, or hand weakness, and when these changes began. A detailed family and health history can help because Charcot-Marie-Tooth disease type 1C often runs in families.
The exam looks for reduced reflexes, muscle weakness in the feet or hands, changes in sensation, and a typical walking pattern. Doctors also check foot shape, since high arches or hammertoes can be important clues.
These tests measure how fast electrical signals travel through the nerves. In Charcot-Marie-Tooth disease type 1C, results often show slowed conduction, which supports a diagnosis of Charcot-Marie-Tooth disease type 1C and helps point to a myelin-related form of neuropathy.
Electromyography, often called EMG, checks how muscles respond to nerve signals. It can help show whether weakness is coming from nerve damage rather than a primary muscle problem.
How is Charcot-marie-tooth disease type 1c diagnosed?
Charcot-Marie-Tooth disease type 1C is usually diagnosed from a mix of your symptoms, your family history, and a physical exam that looks for signs such as foot shape changes, muscle weakness, balance problems, and reduced reflexes. Doctors often do nerve tests to see how well and how fast signals travel through the nerves in the arms and legs, because in this condition those signals are usually slower than normal. A genetic test can then help confirm that the cause is type 1C and can also help tell it apart from other kinds of Charcot-Marie-Tooth disease.
Stages of Charcot-marie-tooth disease type 1c
Charcot-Marie-Tooth disease type 1C does not have defined progression stages. This is because it usually develops slowly and varies from one person to another, rather than moving through clear, fixed steps that everyone follows. Early and accurate diagnosis helps you plan ahead with confidence. Doctors usually diagnose and monitor Charcot-Marie-Tooth disease type 1C by looking at symptoms such as slowly worsening foot weakness, balance problems, or high arches, along with a nerve exam and tests that measure how well nerves carry signals; genetic testing can confirm the cause, especially when the early symptoms of Charcot-Marie-Tooth disease type 1C are mild or overlap with other nerve conditions.
Outlook and prognosis
The outlook for people with Charcot-Marie-Tooth disease type 1C is generally favorable in terms of life expectancy, which is usually near normal because the condition typically affects peripheral nerves rather than vital organs. Symptoms often begin in childhood or early adulthood and tend to progress slowly, with gradual weakness, foot deformities, balance problems, and sensory loss that can vary widely even within the same family. Most people remain ambulatory for many years, although some eventually need orthotics, walking aids, or supportive therapy to maintain mobility and reduce falls. Severe disability is less common than in some other neuromuscular disorders, but pain, fatigue, and hand involvement can have a meaningful impact on daily function and quality of life. Mortality directly related to Charcot-Marie-Tooth disease type 1C is not generally increased, and deaths from the disease itself are considered uncommon. Regular neurologic follow-up, physical therapy, and attention to foot care and orthopedic complications can help preserve independence over time.
Long-term effects
Charcot-Marie-Tooth disease type 1C usually changes slowly over many years, and many living with Charcot-Marie-Tooth disease type 1C have a normal life span. The main long-term effects involve the nerves in the feet, legs, and sometimes the hands, which can affect walking, balance, and fine hand use. Features can range from mild to more limiting, even within the same family. It’s important to remember that long-term doesn’t always mean progressive at the same speed for everyone.
Weakness in the feet and lower legs often becomes more noticeable over time, which can make walking slower, less steady, or more tiring. Some may develop a high-stepping walk or have trouble with uneven ground and stairs.
Over the years, many people develop high arches, hammertoes, or other foot shape changes. These changes can make shoes harder to fit and may add to discomfort or walking problems.
Reduced feeling in the feet can make balance harder, especially in the dark or on rough surfaces. Early signs of Charcot-Marie-Tooth disease type 1C may be subtle, but over time some people notice more trips, ankle instability, or falls.
In some people, weakness and loss of coordination later affect the hands and fingers. This can make buttons, handwriting, jar lids, or other small daily tasks more difficult.
How is it to live with Charcot-marie-tooth disease type 1c?
Living with Charcot-Marie-Tooth disease type 1C often means adapting to slowly progressive weakness, foot and lower-leg muscle loss, balance problems, and reduced sensation, which can make walking long distances, climbing stairs, driving, or tasks that rely on fine hand control more tiring over time. Many people with CMT1C use supportive shoes, braces, physical or occupational therapy, and pacing strategies to protect energy and stay independent, although day-to-day impact can vary widely even within the same family.
For families and other people close by, the effects are often practical as much as emotional: they may help with transportation, household tasks, fall prevention, or planning around fatigue and mobility limits. Even so, many people with CMT1C build full, meaningful routines, and the right supports can make daily life feel far more manageable and predictable.
Treatment and drugs
Charcot-Marie-Tooth disease type 1C is usually treated by managing symptoms and protecting muscle and nerve function, since there is no cure that reverses the underlying genetic change. Treatment plans often combine several approaches: physical therapy to keep muscles flexible and strong, occupational therapy for hand use and daily tasks, braces or custom shoe inserts to steady the ankles and improve walking, and pain treatment if nerve pain or cramping is a problem. For many, this can mean using ankle-foot braces to make it easier to walk across a parking lot or climb stairs with less tripping, and some people benefit from orthopedic surgery if foot shape changes become severe. Alongside medical treatment, lifestyle choices play a role, including regular low-impact exercise, foot care, and avoiding medicines known to irritate nerves; early treatment for Charcot-Marie-Tooth disease type 1C can help people stay active and independent longer.
Can you cure Charcot-marie-tooth disease type 1c?
No, Charcot-Marie-Tooth disease type 1C cannot be cured at this time. Treatment can still help a lot by easing symptoms and helping people stay active and independent, often with physical therapy, hand therapy, braces or supportive shoes, pain care, and sometimes surgery for foot problems.
Non-drug treatment
Day-to-day care for Charcot-Marie-Tooth disease type 1C usually focuses on keeping you steady, mobile, and as independent as possible as weakness and balance problems change over time. Non-drug treatments often lay the foundation for managing Charcot-Marie-Tooth disease type 1C, especially for foot drop, hand weakness, cramps, and fatigue. Because symptoms can vary from one person to another, treatment is usually tailored and adjusted over time.
Physical therapy helps maintain strength, balance, flexibility, and walking ability without overworking weak muscles. A therapist may teach low-impact exercise, stretching, and safer ways to move if stairs, uneven ground, or long walks are becoming harder.
Occupational therapy can make everyday tasks easier when hand weakness or reduced fine motor control affects buttons, writing, cooking, or typing. For many, treatment begins not at the pharmacy, but with practical changes such as hand exercises, adaptive tools, and simpler ways to manage dressing and work tasks.
Ankle-foot braces, shoe inserts, and custom footwear can improve foot position and help with foot drop, tripping, and ankle instability. Many living with Charcot-Marie-Tooth disease type 1C find that the right brace reduces falls and makes walking less tiring.
Regular, moderate exercise such as walking, cycling, swimming, or water therapy can support endurance and joint health. Not every approach works the same way, so exercise plans should be paced to avoid overuse and should match your current strength and balance.
Your genes may have an impact on how drugs work for you
For people living with Charcot-Marie-Tooth disease type 1C, there is no well-established evidence that the gene change causing this condition clearly predicts how the usual symptom-relief medicines will work, so treatment is generally chosen based on symptoms, benefit, and side effects rather than a special gene-based drug match. Many with this condition use medicines for nerve pain, cramps, or mood symptoms, and like anyone else, inherited differences can sometimes affect how strongly a medicine works or how likely it is to cause side effects such as sleepiness or dizziness. One important day-to-day point is that some medicines can make nerve problems worse in people with Charcot-Marie-Tooth in general, so it is a good idea to have every new prescription checked by a clinician who knows about the condition.
Pharmacological treatments
For many living with Charcot-Marie-Tooth disease type 1c, medicines are mainly used to ease symptoms such as nerve pain, aching joints, or muscle cramps, rather than to change the underlying nerve condition. At this time, there is no approved drug that specifically stops or reverses Charcot-Marie-Tooth disease type 1c. Not everyone responds to the same medication in the same way. Treatment is usually tailored to the symptoms that affect daily life most, such as burning foot pain, poor sleep from discomfort, or painful cramping after activity.
Drugs such as gabapentin, pregabalin, duloxetine, and amitriptyline are often used when Charcot-Marie-Tooth disease type 1c causes burning, shooting, or tingling pain. These are among the most common medications for nerve pain in Charcot-Marie-Tooth disease type 1c, although the best choice depends on side effects, sleep, mood, and other health conditions.
Acetaminophen or nonsteroidal anti-inflammatory drugs such as ibuprofen and naproxen may help with sore muscles or joint pain linked to foot shape changes and overuse. These medicines usually do not help much with true nerve pain, but they can be useful for day-to-day aches.
Lidocaine patches or capsaicin cream may help some people with small areas of painful burning or sensitivity, especially in the feet. Because they act mainly on the skin, they may cause fewer whole-body side effects than pills.
If painful cramps are a major problem, doctors may sometimes consider medicines such as mexiletine, or occasionally baclofen in selected situations. These drugs are not right for everyone, so the expected benefit has to be weighed against possible side effects and heart or balance concerns.
Genetic influences
For many living with Charcot-Marie-Tooth disease type 1c, family questions come up because this specific form is usually caused by a change in the LITAF gene. It is most often inherited in an autosomal dominant pattern, which means one changed copy of the gene from either parent can be enough to cause Charcot-Marie-Tooth disease type 1c. That change affects the protective covering around peripheral nerves, so signals travel less efficiently and everyday things like long walks, climbing stairs, or fine finger tasks may become harder over time. Even with the same gene change, people can have quite different symptoms and different ages when problems begin, including within the same family. In some families the gene change is passed down across generations, while in others it appears for the first time in one relative. Genetic testing for Charcot-Marie-Tooth disease type 1c can help confirm the diagnosis and may be useful when relatives want clearer information about their own risk.
Is Charcot-marie-tooth disease type 1c genetic?
Genetics are central to Charcot-Marie-Tooth disease type 1C, because it is caused by an inherited change in a specific gene. Different genetic variations can affect how early symptoms of Charcot-Marie-Tooth disease type 1C begin and how severe they become.
Having a genetic risk is not necessarily a diagnosis
Genetic variants are common and are a normal part of being human. Most do not directly affect health and simply reflect natural differences among people. For many genes, having a variant connected with a condition suggests a possible link rather than a definite diagnosis, especially when more than one gene and environmental factors are involved. In some cases, though, a single well-characterized variant in a particular gene is enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
In Charcot-Marie-Tooth disease type 1c, the genetic result matters most because it confirms the exact inherited nerve condition and helps guide care. For many living with Charcot-Marie-Tooth disease type 1c, treatment is mainly supportive, such as physical therapy, braces, foot care, pain treatment when needed, and sometimes surgery for foot problems, rather than a medicine that fixes the underlying gene change. A confirmed genetic diagnosis can also help doctors avoid treatments that are more useful for other nerve disorders, since inherited neuropathies like Charcot-Marie-Tooth disease type 1c usually do not improve with immune-based drugs such as steroids or IVIG. Not every difference in response is genetic, but doctors are often careful with medicines that can worsen nerve damage in people with Charcot-Marie-Tooth disease, especially certain chemotherapy drugs such as vincristine. Right now, there is no proven gene-targeted drug specifically for Charcot-Marie-Tooth disease type 1c, so genetics is used more to guide safe, accurate treatment than to choose from a special list of medications. If you are wondering about the best treatment for Charcot-Marie-Tooth disease type 1c, genetic testing can be an important part of making sure the care plan fits the condition you actually have.
Interactions with other conditions
For many living with Charcot-Marie-Tooth disease type 1C, other health problems that affect nerves, muscles, or balance can make daily symptoms feel more noticeable. Diabetes is one of the clearest examples, because high blood sugar can also damage peripheral nerves, so weakness, numbness, burning pain, or problems with walking may become harder to sort out. Doctors call it a comorbidity when two conditions occur together. Thyroid disease, vitamin deficiencies, heavy alcohol use, and other causes of neuropathy may also add to nerve symptoms, which can make the early symptoms of Charcot-Marie-Tooth disease type 1C seem to worsen more quickly than expected. Foot and ankle problems linked to Charcot-Marie-Tooth disease type 1C can also interact with arthritis or spine conditions, sometimes leading to more pain, falls, or trouble with mobility. Because Charcot-Marie-Tooth disease type 1C is inherited and tends to progress slowly, it is worth asking your doctor whether another treatable condition could be adding to the picture rather than assuming every new symptom is from CMT alone.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
What other conditions can cause similar symptoms to Charcot-marie-tooth disease type 1c?
Other types of Charcot-Marie-Tooth disease are the conditions most often mistaken for Charcot-Marie-Tooth disease type 1C because they can cause the same slow-moving foot weakness, numbness, high arches, and balance trouble. Doctors may also consider more common causes of nerve damage, such as diabetes, low vitamin B12, or an underactive thyroid, and a treatable immune-related nerve problem called chronic inflammatory demyelinating polyneuropathy, which can look very similar. In some people, pinched nerves or problems in the lower spine can also cause weakness or numbness that overlaps with this condition.
History
Long before there were modern nerve tests, doctors were already describing families in which several relatives developed high arches, frequent ankle sprains, foot drop, and slowly worsening weakness in the lower legs. By the late 1800s, these patterns were brought together under the broader name Charcot-Marie-Tooth disease, after the physicians who described it in medical reports. For many living with Charcot-Marie-Tooth disease type 1c, that history matters because the condition did not appear all at once in medicine; it was recognized gradually as doctors noticed that similar day-to-day problems could have different underlying forms.
As medical science evolved, specialists learned that Charcot-Marie-Tooth disease was not a single disorder but a group of related nerve conditions. During the 1900s, better neurological exams, nerve conduction studies, and later laboratory tools helped separate forms that mainly affect the nerve’s protective covering from those that primarily damage the nerve fiber itself. This helped doctors understand why early symptoms of Charcot-Marie-Tooth disease can look similar from one family to another, even when the exact subtype is different.
Charcot-Marie-Tooth disease type 1c was identified later as one of the less common type 1 forms, within the group that tends to involve slowed nerve signaling. That shift was important for families who had often been told only that they had “a neuropathy” or an unspecified form of Charcot-Marie-Tooth disease. Over time, researchers were able to connect this subtype to a specific genetic cause, although many people were recognized clinically before genetic testing became widely available.
Today, the history of Charcot-Marie-Tooth disease type 1c reflects a broader change in medicine: moving from descriptions based only on symptoms to a more precise understanding of subtypes. For patients, that can mean clearer answers about why walking gets harder over time, why hand weakness may appear later, or why one relative is more affected than another. Even so, the condition is still often identified first through everyday signs people notice at home, such as trouble keeping up on uneven ground or needing shoes that better support weak ankles.