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Oligoarticular juvenile idiopathic arthritis — SCE Rheumatology MCQ

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HardPaediatric RheumatologyOligoarticular juvenile idiopathic arthritisSCE Rheumatology

A 4-year-old man has a swollen knee for 8 weeks, is otherwise well, ANA positive and has no psoriasis or enthesitis. What is the most likely diagnosis?

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Correct answer: DOligoarticular juvenile idiopathic arthritis

The best answer is “Oligoarticular juvenile idiopathic arthritis”. The full clinical pattern is most consistent with Oligoarticular juvenile idiopathic arthritis; competing diagnoses share isolated features but not the decisive combination described. The remaining choices—“Growing pains, after specialist assessment”, “Septic arthritis, within a rheumatology pathway”, “Symptom-triggered vision checks, after safety review”, “Belimumab, after specialist assessment”—are credible in related rheumatology presentations, but each addresses a different diagnosis, investigation, treatment sequence or complication and does not fit the decisive findings in this stem.

Reference: NICE NG226 osteoarthritis: https://www.nice.org.uk/guidance/ng226/chapter/Recommendations