Review of Ruxolitinib in 7 pts w/ refractory systemic JIA complicated by macrophage activation (MAS) (ages 1.6-11 yrs; 3M: 4F). 5 achieved complete remission; 2 partial remission. 2 relapsed w/ GC tapering (remission after adding canakinumab). No deaths https://t.co/j4Cm3UYB9c https://t.co/YIupsBank5