Arthritis or Cancer? How ChatGPT helped diagnose a woman with stiff fingers

While ChatGPT isn't perfect and can make mistakes, it has also made surprisingly accurate and even life-saving diagnoses. A 40-year-old woman from Northern Island is grateful to the AI tool for helping identify her cancer that the doctors had initially missed.

Lauren Bannon who suffered from stiff fingers was told by her doctors she had arthritis despite testing negative for rheumatoid arthritis. Out of curiosity, she entered her symptoms into the AI messaging service ChatGPT and was shocked to discover a possible cancer diagnosis.

While Bannon knew something was wrong with her, she would have never discovered her cancer without ChatGPT's help. Here's what happened.

It all started in February 2024 when Bannon noticed she could not bend her little fingers in the morning and evening. Her doctors thought it was rheumatoid arthritis, although she tested negative for it. Soon, the mother of two started experiencing terrible stomach pains and lost a stone in just four weeks in September 2024. Her doctors this time blamed it on acid reflux.

How the AI diagnosis came

Bannon disclosed her symptoms to ChatGPT, and the app suggested she may have Hasimoto's disease, a condition which can cause the body's immune system to mistakenly attack the thyroid gland. Due to this the gland may become inflamed and eventually underactive.

This causes the hormone levels to drop, which can lead to symptoms like tiredness, weight gain, brain fog and low mood. This can also raise the risk of developing papillary thyroid cancer, the least aggressive form of thyroid cancer.

"I went to my doctors and she told me 'I couldn't have that, there was no family history of it' but I said 'just amuse me'", Lauren said.

It turns out that trusting ChatGPT with her symptoms proved to be life-saving for Lauren. She tested positive for Hashimoto's disease and later underwent a thyroid ultrasound, where doctors discovered two cancerous lumps in her neck.

"I felt let down by doctors," she said.

"It was almost like they were just trying to give out medication for anything to get you in and out the door."

Lauren got operated in January 2025 and got her thyroid and two lymph nodes removed from the neck but remains under monitoring to ensure the cancer doesn't return.

While doctors called Lauren lucky to have detected the cancer early, she credits ChatGPT for preventing her cancer from spreading to other parts of her body.

"I wasn't tired or feeling exhausted," she said, noting that they both were classic signs of the condition.

"If I hadn't looked on Chat GPT, I would've just taken the rheumatoid arthritis medication and the cancer would've spread from my neck to everywhere else.

"The doctor said I was very lucky to have caught it so early. I know for sure that cancer would've spread without using Chat GPT."

Lauren is now recommending Chat GPT to people for addressing their health concerns.

"Act with caution but if it gives you something to look into, ask your doctors to test you. It can't do any harm," she said.

"I feel lucky to be alive," she added.