The key difference between HLH and MAS is that HLH (hemophagocytic lymphohistiocytosis) is a severe, life-threatening hematologic disease, while MAS (macrophage activation syndrome) is a severe, life-threatening rheumatic disease. Cytokine storm is also known as hypercytokinemia. It is a physiological reaction in humans and other animals in which the innate immune system triggers an uncontrolled […]