Protracted familial Mediterranean fever arthritis

Familial Mediterranean fever (FMF) is an inherited disorder characterized b y recurrent attacks of fever and abdominal, chest, and articular pain. The articular attack of FMF is typically an acute, self-limited, large joint mo noarthritis most often affecting the knee or hip. Rarely, a more protracted arthritis may occur. We describe two unusual cases of long-standing FMF ar thritis with excellent response to synovectomy.