(95) In a retrospective analysis of 53 patients treated with anti-CD19 CAR T for B-ALL, higher serum elevations of the proinflammatory cytokines IL1α, IL2, IL3, IL5, IL6, IL10, IL15, INF-γ, interferon-gamma inducible protein-10 (IP10), G-CSF, GM-CSF, and MCP1 by day three after CAR T was associated with severe neurotoxicity. The gene discussed is IL6; the disease is acute lymphoblastic leukemia.