Neurofibromatosis
Informed by recognized medical guidance
Overview
Neurofibromatosis (NF) is a group of genetic conditions that cause tumors to form on nerves anywhere in the body. It is usually present from birth, but symptoms can appear at any age. Most tumors are non-cancerous (benign), but they can cause problems depending on their size and location.
Key facts
- There are three main types: NF1, NF2, and schwannomatosis.
- NF is not contagious and is not caused by anything you or your parents did.
- Many people with NF have mild symptoms and live full, healthy lives.
NF is considered rare. NF1 is the most common type, affecting about 1 in 3,000 people worldwide.
It affects all genders equally and occurs in all ethnic groups. It is usually inherited from a parent, but about half of cases appear with no family history.
Symptoms
- Sudden loss of vision or hearing
- Severe headache that does not go away
- Sudden weakness or numbness on one side of the body
- A seizure for the first time
- ⚠A new lump that grows quickly
- ⚠Severe or worsening pain
- ⚠New or worsening back pain
- ⚠A fever with a lump that is red and warm
Common symptoms
- Light brown spots on the skin (café-au-lait spots)
- Freckles in unusual places, like under the arms or in the groin
- Soft bumps on or under the skin (neurofibromas)
- Bone problems, such as curvature of the spine (scoliosis)
- Vision or hearing changes (depending on the type)
Symptoms in children
- Learning difficulties or attention problems
- Delayed speech or motor skills
- Larger head size compared to other children
- Bumps that appear in early childhood
Symptoms in older adults
- Tumors may grow slowly over many years
- High blood pressure can develop, related to the condition
- Pain or weakness caused by nerve compression
- Tiredness or sleep issues
Causes
Main causes
- Neurofibromatosis is caused by a change (mutation) in certain genes. NF1 is caused by changes in the NF1 gene, and NF2 in the NF2 gene. These genes normally help control cell growth. When they are faulty, cells can grow out of control and form tumors.
Risk factors
- A family history of neurofibromatosis is the main risk factor. If one parent has NF1 or NF2, each child has a 50% chance of inheriting the condition. However, about half of people with NF develop it from a new gene change with no family history.
When to see a doctor
See a doctor urgently if:
- If you notice a sudden change in your symptoms, such as rapid tumor growth, new neurological problems, or severe pain, contact your doctor promptly.
Book a routine appointment if:
- If you or your child have any signs of NF, such as multiple café-au-lait spots or a lump under the skin, make an appointment for a full evaluation.
Diagnosis
Doctors usually diagnose NF by a clinical examination and by checking for the signs and symptoms. In many cases, a doctor experienced in NF can make a diagnosis based on visible features and family history.
Tests that may be done
- A thorough physical and neurological examination
- An eye examination by an ophthalmologist
- Imaging tests, such as MRI or CT scans, to look at tumors inside the body
- Genetic testing to confirm the diagnosis or identify the gene change
- Hearing tests for NF2 and schwannomatosis
What to expect at your appointment
If you are referred to a specialist, you may have several tests over a few visits. The process usually takes a few weeks. Your doctor will explain the results and discuss what they mean for your health and for your family, if relevant.
Treatment
There is currently no cure for neurofibromatosis, but there are many ways to manage symptoms and complications. Treatment depends on the type of NF, the location of tumors, and how they affect you. Many people need no treatment at all, only monitoring.
Self-care at home
- Keep all follow-up appointments for regular check-ups.
- Use sunscreen to protect your skin and watch for any changes in bumps or spots.
- Report new or worsening symptoms to your doctor.
- Seek support for learning difficulties or pain-management as needed.
Medical treatments
Medical treatment may include pain medicines (as recommended by your doctor), medications to shrink certain types of tumors (these are specialist treatments, not over-the-counter), chemotherapy in rare cases for cancerous tumors, and targeted therapies that block the gene signals driving tumor growth. Always ask your specialist about your options.
When is surgery considered?
Surgery can be used to remove tumors that are causing pain, pressing on important nerves, or affecting vision, hearing, or breathing. It is not usually offered for small, stable tumors that cause no symptoms.
Living with this condition
Living with NF often means learning to manage symptoms while carrying on with normal life. Many people lead full lives with work, family, and friends. Regular check-ups help you stay ahead of any changes.
Lifestyle tips
- Get enough sleep and learn ways to manage stress.
- Stay active within your comfort level; movement helps overall health.
- Avoid smoking and limit alcohol to lower overall risk.
- Use a medical ID bracelet if you have a condition that affects your eyes, ears, or brain.
Diet and exercise
A balanced diet with plenty of fruits, vegetables, whole grains, and protein supports your general health. Exercise such as walking, swimming, or gentle stretching can help with energy, mood, and pain. If you have bone or nerve problems, talk to a physiotherapist for a safe plan.
Mental health and emotional wellbeing
A chronic condition like NF can cause anxiety or low mood. It is normal to feel worried, especially after a new diagnosis. Talking to a psychologist or counselor can help. Remember that you are not alone, and support is available.
Prevention
Neurofibromatosis is a genetic condition that cannot be prevented. If you have NF and are considering having children, genetic counseling can explain the risks and options.
Vaccines
This is not a condition that vaccines can prevent. However, it is important to keep up with recommended vaccinations for your overall health.
Screening programmes
If you have NF, regular monitoring is important. Your doctor may recommend yearly eye checks, hearing tests, or imaging scans to detect changes early. This is not a prevention, but early detection helps avoid complications.
Complications
If left untreated
- Untreated tumors may grow and press on nerves, causing pain or weakness.
- Untreated bone changes can lead to deformities or scoliosis.
- In rare cases, a benign tumor may become cancerous.
- Untreated hearing loss or vision problems can worsen over time.
Long-term outlook
The outlook for neurofibromatosis varies. Many people have mild symptoms and need no treatment. Life expectancy for most people with NF1 is close to normal. With regular care, complications can be managed, and most people lead full, active lives. Even when symptoms are more serious, newer treatments are improving outcomes.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
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Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 31, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.