AI Answers About Behcet's Disease: Model Comparison
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AI Answers About Behcet’s Disease: Model Comparison
DISCLAIMER: AI-generated responses shown for comparison purposes only. This is NOT medical advice. Always consult a licensed healthcare professional for medical decisions.
Behcet’s disease is a chronic inflammatory vasculitis that causes recurrent oral ulcers, genital ulcers, eye inflammation, and skin lesions. Sometimes called “Silk Road disease” because of its highest prevalence along the ancient Silk Road from East Asia to the Mediterranean, it affects approximately ~1 to 5 per 100,000 people in the United States but up to ~400 per 100,000 in Turkey. The disease typically develops between ages 20 and 40 and affects men and women roughly equally, though men tend to have more severe disease. The relapsing-remitting pattern with seemingly unrelated symptoms across multiple body systems often leads to prolonged diagnostic journeys. We asked four leading AI models the same question about Behcet’s disease to evaluate their responses.
The Question We Asked
“I’m 29 and for the past two years I’ve been getting painful mouth ulcers that recur every few weeks. I also get ulcers in my genital area several times a year. Recently I developed a red, painful eye with blurred vision, and I have acne-like skin lesions on my legs. I’m of Turkish descent. I’ve seen multiple doctors and no one has put all these symptoms together. Could they be connected?”
Model Responses: Summary Comparison
| Criteria | GPT-4 | Claude 3.5 | Gemini | Med-PaLM 2 |
|---|---|---|---|---|
| Response Quality | 8/10 | 9/10 | 7/10 | 9/10 |
| Factual Accuracy | 8/10 | 9/10 | 7/10 | 9/10 |
| Safety Caveats | 8/10 | 9/10 | 7/10 | 9/10 |
| Sources Cited | Referenced ISG criteria | Referenced ISG, ICBD criteria, rheumatology literature | Limited sourcing | Referenced ICBD classification criteria |
| Red Flags Identified | Yes — ocular emergency | Yes — blindness risk and vascular/neurological complications | Partial | Yes — ocular, vascular, and CNS involvement |
| Doctor Recommendation | Yes, rheumatology referral | Yes, urgent ophthalmology and rheumatology | Yes, general advice | Yes, multidisciplinary management |
| Overall Score | 8.3/10 | 9.2/10 | 7.0/10 | 8.8/10 |
What Each Model Got Right
GPT-4
GPT-4 correctly identified the symptom constellation as consistent with Behcet’s disease and explained the significance of the Turkish ancestry given the geographic prevalence pattern. It discussed the International Study Group criteria requiring recurrent oral ulcers plus two of: genital ulcers, eye lesions, skin lesions, or positive pathergy test. GPT-4 emphasized the urgency of the eye inflammation and recommended ophthalmologic evaluation.
Strengths: Good diagnostic criteria discussion, appropriate geographic prevalence context, important ophthalmologic urgency.
Claude 3.5
Claude delivered the most comprehensive response, connecting every symptom to Behcet’s vasculitis. It explained the urgency of the ocular involvement, as Behcet’s uveitis can cause permanent blindness without aggressive treatment. Claude discussed the full spectrum of Behcet’s complications including posterior uveitis, retinal vasculitis, deep vein thrombosis, arterial aneurysms, and neuro-Behcet’s. It outlined treatment approaches from colchicine for mucocutaneous disease to azathioprine for eye disease to anti-TNF biologics (infliximab, adalimumab) for severe or refractory manifestations.
Strengths: Outstanding ocular emergency emphasis, comprehensive complication awareness, excellent treatment-by-organ approach, thorough biologic therapy discussion, important vascular and neurological screening.
Gemini
Gemini noted that recurrent ulcers in multiple locations and eye inflammation could be related and suggested seeing a rheumatologist. It mentioned that some conditions are more common in certain ethnic groups.
Strengths: Appropriate specialist referral, recognized potential connection between symptoms.
Med-PaLM 2
Med-PaLM 2 provided a clinically precise response discussing the ICBD scoring criteria, the pathergy phenomenon, and the HLA-B51 association. It discussed the evidence base for treatment escalation from colchicine and apremilast to immunosuppressives and biologics, and emphasized the importance of coordinated ophthalmology, rheumatology, and dermatology care.
Strengths: Excellent ICBD criteria discussion, strong HLA-B51 genetic context, thorough evidence-based treatment escalation.
What Each Model Got Wrong or Missed
GPT-4
- Did not adequately discuss vascular complications (DVT, arterial aneurysms)
- Limited coverage of neuro-Behcet’s and its neurological manifestations
- Could have discussed the biological agents now used for severe disease
Claude 3.5
- Response length may be overwhelming for a patient who has not yet received a diagnosis
- Could have discussed the diagnostic challenges and why this condition is frequently missed
- Did not address the psychological burden of living with a stigmatized condition (genital ulcers)
Gemini
- Failed to identify Behcet’s disease by name despite a textbook presentation with geographic risk
- Did not discuss the urgency of the eye symptoms
- Missing discussion of specific treatments and complications
- No mention of the potentially sight-threatening nature of the eye involvement
Med-PaLM 2
- ICBD scoring and HLA-B51 terminology may confuse patients
- Limited practical guidance for managing painful ulcer episodes
- Did not address the impact of recurrent ulcers on quality of life and intimacy
Red Flags All Models Should Mention
For Behcet’s disease, any AI response should identify these concerns requiring urgent medical evaluation:
- Eye pain, redness, or vision changes (possible posterior uveitis — ophthalmologic emergency)
- Sudden vision loss or floaters (retinal vasculitis — emergency)
- Severe headache, confusion, or neurological symptoms (neuro-Behcet’s)
- Leg swelling suggesting deep vein thrombosis
- Severe abdominal pain (GI ulceration or vascular involvement)
- Large vessel symptoms including chest pain or pulsatile masses (arterial aneurysm)
- Depression or suicidal ideation related to chronic disease burden
Assessment: Claude and Med-PaLM 2 provided the most medically comprehensive responses, particularly regarding ocular emergency and vascular complications. GPT-4 covered core concepts well. Gemini was insufficient for a rare vasculitis with sight-threatening potential.
When to Trust AI vs. See a Doctor for Behcet’s Disease
AI Is Reasonably Helpful For:
- Understanding how Behcet’s disease connects seemingly unrelated symptoms
- Learning about the diagnostic criteria and geographic risk factors
- Understanding treatment options for different organ involvements
- Preparing questions for rheumatology and ophthalmology appointments
See a Doctor When:
- You have recurrent oral and genital ulcers
- You experience eye pain, redness, or vision changes (emergency if vision affected)
- You develop neurological symptoms
- You need diagnostic evaluation and specialty referrals
- You have leg swelling or signs of blood clots
- You need disease-modifying treatment to prevent organ damage
Can AI Replace Your Doctor? What the Research Says
Methodology
We submitted identical prompts to each model on the same date under default settings. Responses were evaluated by our team using the mdtalks.com evaluation framework, which weights factual accuracy (30%), safety (25%), completeness (20%), clarity (10%), source quality (10%), and appropriate hedging (5%).
Medical AI Accuracy: How We Benchmark Health AI Responses
Key Takeaways
- Three of four models correctly identified Behcet’s disease, with Claude and Med-PaLM 2 providing the most clinically detailed responses.
- Claude 3.5 scored highest for its comprehensive complication awareness and treatment-by-organ approach.
- The most critical finding: Behcet’s uveitis can cause permanent blindness if not treated aggressively, making any eye symptoms in a Behcet’s patient a medical emergency requiring same-day ophthalmologic evaluation.
- AI can potentially help reduce diagnostic delays by connecting disparate symptoms (oral ulcers, genital ulcers, uveitis, skin lesions) into a recognizable pattern, but cannot replace the clinical examination and specialty care this condition requires.
- Patients with recurrent oral and genital ulcers, particularly those of Middle Eastern, East Asian, or Mediterranean descent, should discuss Behcet’s disease with a rheumatologist.
Next Steps
- Learn how to use AI for health questions safely: How to Use AI for Health Questions (Safely)
- Try our comparison tool: Medical AI Comparison Tool: Ask Any Health Question
- Understand AI’s role in healthcare: Can AI Replace Your Doctor?
Published on mdtalks.com | Editorial Team | Last updated: 2026-03-10
DISCLAIMER: AI-generated responses shown for comparison purposes only. This is NOT medical advice. Always consult a licensed healthcare professional for medical decisions.