IFNG and hemophagocytic syndrome: Based on platelets < 33.5*109/L, IL-6 > 20.79 pg/ml, IFN-γ > 12.12 pg/ml, and IL-10 > 39.87 pg/ml, a nomogram prediction model was developed in this study to differentiate patients with EBER-positive LAHS from those with non-neoplastic EBV-HLH.