Hemophagocytic lymphohistiocytosis post chimeric antigen receptor T cell therapies

Besides cytokine release syndromes (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS), immune effector cell-associated HLH-like syndrome (IEC-HS) is increasingly recognized across CAR-T recipients. This emergent and fatal syndrome is difficult to separate from other disorders during the early phase, and urgently requires more integrated diagnostic and therapeutic frameworks.