abstract:Systemic onset juvenile idiopathic arthritis (also called Systemic juvenile idiopathic arthritis (sJIA), formerly called systemic onset juvenile rheumatoid arthritis or Still's disease) is a type of juvenile idiopathic arthritis (JIA) with extra-articular manifestations like fever and rash apart from arthritis. It is sometimes called adult-onset Still's disease when it occurs in patients over the age of 16.