GSTM1 and hemophagocytic syndrome: Secondly, investigations demonstrated an elevated ferritin of 98,870 μg/L, triglycerides of 8.49 mmol/L, d-dimer > 35.20 mg/L FEU, fibrinogen of 1.01 g/L, and aspartate aminotransferase (AST) of 645 U/L, coupled with pancytopenia [hemoglobin (Hb) of 9.9 d/L, WBC of 1.01 × 109/L, and platelet count of 60 × 109/L], which were suggestive of secondary hemophagocytic lymphohistiocytosis (HLH).