Juvenile idiopathic arthritis - Wikipedia, the free encyclopediaJuvenile idiopathic arthritis (JIA) (aka Juvenile Rheumatoid Arthritis JRA) is the most common form of persistent arthritis in children. (Juvenile in this context ...Juvenile Chronic Arthritis : JRA / JCA by drdoc on-lineJuvenile chronic arthritis by drdoc on-line. Juvenile Chronic Arthritis : JRA / JCA by drdoc on-line : 1. DefinitionJuvenile Chronic Arthritis | Doctor | Patient UKSynonyms: juvenile rheumatoid arthritis, juvenile idiopathic arthritis, Still's disease, juvenile arthritis Juvenile chronic arthritis (JCA) is a group of systemic ...