Juvenile Idiopathic Arthritis - KidsHealth - the Web's most ...Juvenile idiopathic arthritis (also called juvenile rheumatoid arthritis) affects some 50,000 kids in the United States. Learn more.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 Rheumatoid Arthritis: MedlinePlusJuvenile rheumatoid arthritis (JRA) is a type of arthritis that happens in children age 16 or younger. It causes joint swelling, stiffness and sometimes reduced ...