- Patients must have a diagnosis of juvenile rheumatoid arthritis (JRA) with polyarticular JRA for at least 6 months, systemic JRA with a polyarticular course and no systemic symptoms (including fever, rash,hepatosplenomegaly, and serositis) for 1 year prior to study entry, or pauciarticular JRA with a polyarticular course for at least 6 months prior to study entry. The patient should have had at least 6 months of persistent synovitis before screening.