Skip to main content

Health condition · Clinically reviewed

Neurofibromatosis, two genetic conditions, one lifelong surveillance plan.

NF1 and NF2 are distinct conditions that both cause tumours to grow along nerves. Genetic testing, imaging and specialist follow-up shape a plan built around your specific type.

Jump to treatment
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against NICE, NHS England specialist commissioning and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK guidance including MEK inhibitors, complex NF specialist services and genetic counselling pathways.

Key facts

Neurofibromatosis at a glance.

The essentials, in plain English - what it is, how the two types differ, and how it’s managed in the UK today.

  • What it is

    A group of genetic conditions causing tumours to grow along nerves - most often NF1, sometimes NF2, each with different features.

  • NF1 prevalence

    The most common type, affecting roughly 1 in 2,500 to 3,000 people, caused by a mutation in the NF1 gene.

  • NF2 prevalence

    Much rarer, caused by a mutation in the NF2 gene, and best known for bilateral vestibular schwannomas.

  • Genetic testing

    Confirms the diagnosis, guides surveillance and informs family planning through genetic counselling.

  • Lifelong follow-up

    Both types need ongoing surveillance for tumour growth - skin, optic pathway, plexiform and vestibular tumours.

  • Specialist care

    Complex NF1 and NF2 disease is managed through NHS England commissioned specialist neurofibromatosis services.

Why this guide matters

Two conditions, one shared principle - watch and act early.

NF1 and NF2 are lifelong, but neither is untreatable. The three points below shape everything else on this page.

  • The two types need different tests

    NF1 diagnosis rests on skin, eye and developmental features. NF2 diagnosis rests on imaging for vestibular schwannomas. Getting the right pathway matters.

  • Surveillance catches problems early

    Regular imaging and clinical review find growing tumours before they cause permanent damage - this is the backbone of long-term care.

  • Genetics shapes the whole family

    Both types are usually inherited - genetic counselling helps relatives understand their own risk and options.

How the diagnosis is made

From first signs to a confirmed diagnosis.

The steps a UK GP, geneticist or specialist NF service will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    Clinical assessment

    A detailed history and examination, looking for the specific diagnostic features of NF1 or NF2.

  2. 02

    Assessing

    Diagnostic criteria applied

    Each type has its own clinical diagnostic criteria - a set number of features must be present to confirm a diagnosis.

  3. 03

    Assessing

    Family history review

    Both types are usually inherited in an autosomal dominant pattern, though many cases arise from a new mutation.

  4. 04

    Confirming

    Genetic testing

    Confirms the diagnosis, identifies the specific mutation, and allows testing of at-risk relatives.

  5. 05

    Confirming

    MRI brain and spine

    Imaging looks for optic pathway gliomas, plexiform neurofibromas, vestibular schwannomas and other nerve tumours.

  6. 06

    Planning

    Referral to a specialist NF service

    Complex or confirmed cases are referred to an NHS England commissioned genetics, neurology or neurofibromatosis clinic.

  7. 07

    Planning

    Baseline surveillance plan

    A tailored, lifelong monitoring schedule is agreed, matched to the type and features present.

Typical timeline: clinical suspicion to genetic confirmation in weeks, not months.

Symptoms

What neurofibromatosis actually looks like.

Presentation varies considerably by type - see our dedicated NF1 and NF2 pages for the full detail. Here is the essential overview.

  • Cafe-au-lait spots

    Flat, light-brown patches of skin - often the earliest visible sign of NF1, usually present from childhood.

  • Cutaneous neurofibromas

    Soft, benign nerve-sheath tumours on or under the skin - a hallmark feature of NF1 that increases with age.

  • Plexiform neurofibromas

    Larger, more diffuse nerve tumours that can cause pain, disfigurement or nerve compression, and carry a small malignant transformation risk.

  • Lisch nodules

    Small, harmless pigmented spots on the iris - visible on eye examination and specific to NF1.

  • Learning difficulties

    Common in NF1, ranging from mild specific learning difficulties to more significant developmental delay.

  • Bilateral vestibular schwannomas

    The defining feature of NF2 - tumours on both hearing and balance nerves, usually causing progressive hearing loss.

  • Hearing and balance changes

    Tinnitus, unsteadiness or gradual hearing loss are often the first symptoms that lead to an NF2 diagnosis.

  • Red flag - rapid tumour growth

    Sudden pain, rapid enlargement or new neurological symptoms in an existing neurofibroma need urgent specialist review.

Treatment

How neurofibromatosis is managed in the UK.

Management is condition and complication-specific, built around lifelong surveillance and delivered through specialist commissioned NF services.

  • Lifelong surveillance

    Regular skin checks, eye examinations and imaging to track tumour growth over time, tailored to the type of NF.

  • MEK inhibitors

    Used for symptomatic, inoperable plexiform neurofibromas in NF1 - can shrink tumours and improve pain and function.

  • Surgery

    Removes problematic neurofibromas, plexiform tumours or vestibular schwannomas causing pain, disfigurement or nerve compression.

  • Radiotherapy

    Considered for selected vestibular schwannomas or other tumours where surgery carries higher risk.

  • Hearing preservation strategies

    For NF2, includes careful monitoring, timed surgery and auditory brainstem implants to protect hearing where possible.

  • Genetic counselling

    Supports family planning decisions, explains inheritance patterns and offers testing for at-risk relatives.

  • MDT specialist review

    Complex cases are managed by a multidisciplinary team through commissioned complex NF1 or NF2 services.

  • Pain and symptom management

    Addresses chronic pain, mobility issues or psychological impact alongside tumour-directed treatment.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or specialist NF team knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • NICE. Clinical knowledge summaries on neurofibromatosis.

  • NHS England. Service specification for complex neurofibromatosis type 1 and type 2.

  • Genetic Alliance UK / Nerve Tumours UK. Patient information on NF1 and NF2.

  • European Journal of Human Genetics. Diagnostic criteria and management consensus for neurofibromatosis.

Red flags

When neurofibromatosis needs urgent attention.

Most NF care is routine and planned. These are the situations that aren’t - and where a specialist opinion is needed quickly.

  • Rapid neurofibroma growth

    Sudden enlargement, new pain or a hardening texture in a neurofibroma can signal malignant transformation and needs urgent assessment.

  • Sudden vision changes

    New visual loss or field changes may indicate an enlarging optic pathway glioma requiring urgent imaging.

  • Progressive hearing loss

    Worsening hearing or new tinnitus in a person with or at risk of NF2 needs prompt audiology and imaging review.

  • New weakness or numbness

    Nerve compression from a plexiform neurofibroma or spinal tumour can cause progressive neurological deficit.

  • Severe or unexplained pain

    New or escalating pain in an existing tumour is not routine and warrants specialist reassessment.

  • Rapid scoliosis progression

    Spinal curvature can worsen quickly in NF1 and needs orthopaedic and specialist NF input.

  • Hypertension in a young person

    Can reflect renal artery stenosis or a phaeochromocytoma, both recognised NF1 associations.

  • Signs of raised intracranial pressure

    Headache, vomiting or drowsiness in NF2, especially with meningiomas, needs emergency assessment.

  • Pregnancy in NF1 or NF2

    Warrants specialist obstetric and genetics input given tumour growth changes and inheritance implications.

Living with it

A lifelong condition, with a clear surveillance plan.

Four things that make the biggest difference over time - keeping appointments, finding support, planning ahead for family, and knowing your pathway.

A quiet reminder

Early monitoring is what makes this manageable.

Most complications are treatable when caught early - consistent surveillance is the single biggest factor in long-term outcomes.

  1. 01 Monitor

    Keep surveillance appointments

    Regular skin, eye and imaging checks catch changes early, when they are easiest to treat.

  2. 02 Support

    Connect with patient groups

    Charities such as Nerve Tumours UK offer practical advice, peer support and up-to-date information.

  3. 03 Family

    Plan genetic counselling early

    Understanding inheritance risk helps with family planning decisions well before they become urgent.

  4. 04 Advocate

    Know your specialist pathway

    Complex NF care sits with commissioned specialist centres - ask your GP for the right referral if you are not already under one.

Frequently asked

Everything we get asked about neurofibromatosis.

Quick answers on the two types, diagnosis, inheritance and treatment.

  • What is neurofibromatosis?

    A group of genetic conditions that cause tumours to grow along nerves. Neurofibromatosis type 1 (NF1) is the most common form, while neurofibromatosis type 2 (NF2) is rarer and mainly affects the nerves involved in hearing and balance.

  • What is the difference between NF1 and NF2?

    NF1 typically causes cafe-au-lait spots, neurofibromas, Lisch nodules and sometimes learning difficulties. NF2 is defined by bilateral vestibular schwannomas causing progressive hearing loss. They are caused by different genes and are managed differently.

  • Is neurofibromatosis inherited?

    Both types follow an autosomal dominant inheritance pattern, meaning an affected parent has a 50% chance of passing the condition to each child. However, around half of cases arise from a new mutation with no family history.

  • How is neurofibromatosis diagnosed?

    Diagnosis combines clinical examination against established diagnostic criteria, genetic testing to confirm the specific mutation, and MRI imaging of the brain and spine to look for tumours.

  • What treatments are available?

    Management is lifelong and tailored to the tumours present. Options include regular surveillance, MEK inhibitors for symptomatic plexiform neurofibromas in NF1, surgery or radiotherapy for problematic tumours, and hearing preservation strategies in NF2.

  • Where is neurofibromatosis treated in the UK?

    Complex NF1 and NF2 disease is managed through NHS England commissioned specialist neurofibromatosis services, bringing together genetics, neurology, neurosurgery and other relevant specialties in one multidisciplinary team.

Related content

Keep reading.

Pulse Healthcare concierge

Send us your enquiry

A concierge service for UK private healthcare. We match you with the best vetted clinics and consultants in our network - they then contact you directly.

So we can match you to the right clinician close to you.

We reply to every enquiry within 24 hours (Mon–Fri). Confidential - your details are never shared outside our vetted consultant network.