Three-year-old girl with oligoarthritis involving the left knee.

A, Three-year-old girl with oligoarthritis involving the left knee. Swelling, flexion contracture, muscle wasting, and a longer leg on the affected side. B, Patient with systemic arthritis demonstrating characteristic erythematous macular rash on forearm with Koebner phenomena (exacerbation of rash by minor trauma). | PJ, H. and RM, L. (2005) ‘Medical treatment of juvenile idiopathic arthritis’, JAMA, 294(13), pp. 1671–1684. Available at: http://dx.doi.org/10.1001/jama.294.13.1671.

Three-year-old girl with oligoarthritis involving the left knee.

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