Neurofibromatosis (NF1 and NF2)

Five questions people ask, put to Google AI Overviews, Google AI Mode and ChatGPT in November 2026.

Got the NHS facts right
10 of 12 answers
Got the NHS facts right
Got the NHS facts right
Got the NHS facts right
Cited NHS or accredited sources
5 of 15 answers with sources
Cited NHS or accredited sources
Cited NHS or accredited sources
Cited NHS or accredited sources

The questions

Question
The NHS says
AI Overviews
AI Mode
ChatGPT
How often should women with NF1 have a mammogram and from what age?
Yearly from age 40
●Different on AI Overviews Google AI Overviews Contradicts the NHS
The NHS says mammogram every year from age 40England
Google AI Mode Matches the NHS
The NHS says mammogram every year from age 40England
ChatGPT (logged out) Matches the NHS
The NHS says mammogram every year from age 40England
How often should my child with NF1 have their eyes checked?
Eye checks every year, adults every 2 years
●Different on AI Overviews Google AI Overviews Contradicts the NHS
The NHS says eye checks every year, adults every 2 years
Google AI Mode Matches the NHS
The NHS says eye checks every year, adults every 2 years
ChatGPT (logged out) Matches the NHS
The NHS says eye checks every year, adults every 2 years
If I have NF1, what are the chances of passing it on to my children?
1 in 2 (50%)
Google AI Overviews Matches the NHS
The NHS says 1 in 2 (50%) chance per child
Google AI Mode Matches the NHS
The NHS says 1 in 2 (50%) chance per child
ChatGPT (logged out) Matches the NHS
The NHS says 1 in 2 (50%) chance per child
Is there a cure for NF2 and what treatments are there?
No cure for NF2
Google AI Overviews Matches the NHS
The NHS says no cure for NF2
Google AI Mode Matches the NHS
The NHS says no cure for NF2
ChatGPT (logged out) Matches the NHS
The NHS says no cure for NF2
What are the first signs of NF2 in adults?
No single NHS line
Google AI Overviews Unconfirmed The first check found no UK source. The second check disagreed, so it isn’t counted.
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Matches the NHS Differs from the NHSUnconfirmed

Where the answers came from

Answers, of 5 with sources
Johns Hopkins MedicineUS hospital2
TrakGeneUK health company1
University of Alabama at BirminghamUS website1
It Would Stink to Have NeurofibromatosisIndividual creator1
Children’s Tumor FoundationUS website1 Incite FulmedUnknown1

Where the answers came from

Answers, of 5 with sources
University of Alabama at BirminghamUS website1 UK Cancer Genetics Group (UKCGG)UK professional body1 ERN GENTURISEU website1
Rare Disease AdvisorUS health website1
European Society of Cataract and Refractive Surgeons (ESCRS)Irish website1
Mayo ClinicUS hospital1
UK charities for neurofibromatosis (NF1 and NF2) Childhood Tumour TrustNerve Tumours UK