Ferritin, LDH, procalcitonin, blood glucose, electrolytes, arterial blood gases (ABG), liver enzymes, urea, creatinine, cardiac markers: NTpro-BNP, Troponin and will also evaluate triglycerides, prothrombin, D-dimers, fibrinogen, and for the differential diagnosis of hemophagocytic lymphohistiocytosis (HLH) or other malignant haemopathies will perform bone marrow examination [40,41]. Here, F2 is linked to hemophagocytic syndrome.