JA GlossaryJuvenile Arthritis Glossary

Juvenile Arthritis (JA): a broad term that encompasses all types of chronic arthritis in children including all the subtypes of JRA and JIA, arthritis associated with SLE, arthritis associated with dermatomyositis, reactive arthritis, etc.

Juvenile Rheumatoid Arthritis (JRA): The American College of Rheumatology (ACR) classification criteria that were developed and validated in 1972 by the ACR  There are three subtypes within this classification: oligoarticular (pauciarticular), polyarticular and systemic with further divisions within the first two subtypes. Reference: Brewer et al, Bull Rheum Dis 23: 712, 1972.

Juvenile Idiopathic Arthritis (JIA):  Classification criteria proposed by the International League of Associations for Rheumatology (ILAR) task force in 1995 that has seven subtypes: systemic, oligoarticular-persistent, oligoarticular-extended, polyarticular-RF (rheumatoid factor) negative, polyarticular-RF positive, enthesitis-related arthritis, psoriatic arthritis, and other (undifferentiated) arthritis. Reference: Fink CW, J Rheumatol 22: 1566, 1995

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