IL-18 may be a biomarker for Systemic JIA (Stills), higher w/ active dz and hx of MAS. Study of 40 sJIA pts finds elevated IL-18 levels inactive and active dz & with history of MAS. IL-18 was correlated w/ ferritin (R=0.74), CXCL9 (R=0.56), S100 (R=0.47) https://t.co/c0KjAyiEjq