Single center comparison of MAS (n 18) to malignancy related mHLH (n = 16). Notable differences seen in platelet (lower in mHLH 29k v 50K), soluble IL-2R (6814 vs 27972), but more hepatomegaly (25% v 0). Less mortality with MAS (22 v 44%, p 0.18) https://t.co/gYdRfxDM2c https://t.co/ekMJfnzElC