Juvenile Rheumatoid Arthritis (JRA) Children can develop many of the same types of arthritis that adults do. Around , minors have been diagnosed with an arthritis disease, but with appropropriate treatment children can live long and active lives. Juvenile idiopathic arthritis (JIA), a cluster of chronic joint conditions affecting children, was once termed “juvenile rheumatoid arthritis.” So it’s little wonder that it was often considered a pint-sized version of rheumatoid arthritis. However, the relationship between JIA and RA is much more complex. Adult juvenile rheumatoid arthritis (Still's disease) Adult juvenile rheumatoid arthritis Systemic onset juvenile idiopathic arthritis.