Arthritis, Juvenile Rheumatoid definition

Arthritis, Juvenile Rheumatoid
Juvenile Idiopathic Arthritis; Juvenile-Onset Still Disease; Juvenile-Onset Stills Disease; Still Disease, Juvenile-Onset; Arthritides, Juvenile Idiopathic; Chronic Arthritis, Juvenile; Idiopathic Arthritides, Juvenile; Idiopathic Arthritis, Juvenile
Rheumatoid arthritis of children occurring in three major subtypes defined by the symptoms present during the first six months following onset: systemic-onset (Still's Disease, Juvenile-Onset), polyarticular-onset, and pauciarticular-onset. Adult-onset cases of Still's disease (STILL'S DISEASE, ADULT-ONSET) are also known. Only one subtype of juvenile rheumatoid arthritis (polyarticular-onset, rheumatoid factor-positive) clinically resembles adult rheumatoid arthritis and is considered its childhood equivalent.