Oligoarticular juvenile arthritis is the most common form of juvenile idiopathic arthritis (JIA), representing nearly 50% of cases. The disease is oligoarticular juvenile idiopathic arthritis (MONDO_0019433). Also known as: Oligoarticular JIA, Pauciarticular JIA, Pauciarticular chronic arthritis, Pauciarticular juvenile idiopathic arthritis.