Macrophage activation syndrome (MAS) is a potentially fatal complication of rheumatic disease, most notably systemic juvenile idiopathic arthritis. Findings from studies in animal models and from clinical observations, particularly in relation to the effects of anticytokine biologic therapies, have led to new concepts of the pathophysiology of this phenomenon.
- Alexei A. Grom
- AnnaCarin Horne
- Fabrizio De Benedetti