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Oligoarticular JIA — SCE Rheumatology MCQ

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HardPaediatric rheumatologyOligoarticular JIASCE Rheumatology

A six-year-old had arthritis confined to one knee throughout the first six disease months. By month nine, both wrists and both ankles are also inflamed, making six joints cumulatively. Which juvenile-idiopathic-arthritis course label now applies?

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Correct answer: E — Extended oligoarticular juvenile idiopathic arthritis

Oligoarticular JIA affects one to four joints during the first six months. Involvement of more than four joints after that point changes the course label to extended oligoarticular JIA; persistent oligoarticular disease remains confined to four or fewer joints.

Reference: NHS England: biologic therapies for juvenile idiopathic arthritis (Published July 2015; updated April 2026): https://www.england.nhs.uk/publication/biologic-therapies-for-the-treatment-of-juvenile-idiopathic-arthritis-jia/; NICE TA373: biologic treatments for juvenile idiopathic arthritis (Published December 2015): https://www.nice.org.uk/guidance/ta373/chapter/1-Recommendations