Which of the following is not a feature of Juvenile Idiopathic Arthritis –

Juvenile idiopathic arthritis Juvenile idiopathic arthritis is broad term that describes a clinically heterogenous group of arthritides of unknown cause, which begin before 16 years of age. This term encompasses several disease categories : - 1. Juvenile rheumatoid arthritis (see previous explanations) : - i) Pauciarticular (oligoarticular) JRA ii) Poly-articular JRA RA. factor (+) ye RA factor (-) ye iii) Systemic JRA Juvenile psoriatic arthritis Juvenile enthesitis related arthritis (ERA) ​Subgroups of Juvenile Idiopathic Arthritis (JIM