Outcome of Patients With Systemic Onset Juvenile Idiopathic Arthritis With Macrophage Activation Syndrome at Onset

摘要

Macrophage activation syndrome (MAS) is a well-known complication of rheumatic diseases such as systemic onset juvenile idiopathic arthritis (SJIA), Kawasaki disease and systemic lupus erythematosus (SLE) [1]. However, MAS may be a difficult diagnosis to make when it happens at the onset of the disease.