Comparative study of 46 AOSD, 9 MAS & 31 adult HLH pts, shows that serum IL-18 was signif higher in AOSD than HLH (closely correlates w/ ferritin, sIL-2R). IL-18, sIL-2R, ‘arthralgia or arthritis’ independently distinguished AOSD from HLH https://t.co/ZW6e78nEkh