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Neuropathology of a Case With Fatal CAR T-Cell-Associated Cerebral Edema
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Neuropathology of a Case With Fatal CAR T-Cell-Associated Cerebral Edema
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Neuropathology of a Case With Fatal CAR T-Cell-Associated Cerebral Edema
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Journal Article
Neuropathology of a Case With Fatal CAR T-Cell-Associated Cerebral Edema
2018
Overview
Abstract
Chimeric antigen receptor (CAR) T cells are a new and powerful class of cancer immunotherapeutics that have shown potential for the treatment of hematopoietic malignancies. The tremendous promise of this approach is tempered by safety concerns, including potentially fatal neurotoxicity, sometimes but not universally associated with cytokine release syndrome. We describe the postmortem examination of a brain from a 21-year-old patient with relapsed pre-B cell acute lymphoblastic leukemia (ALL) who died from fulminant cerebral edema following CAR T-cell infusion. We found a range of changes that included activation of microglia, expansion of perivascular spaces by proteinaceous exudate, and clasmatodendrosis-a beading of glial fibrillary acidic protein consistent with astrocyte injury. Notably, within the brain parenchyma, we identified only infrequent T cells and did not identify ALL cells or CAR T cells. The overall findings are nonspecific but raise the possibility of astrocyte and blood-brain barrier dysfunction as a potential etiology of fatal CAR T-cell neurotoxicity in this patient.
Publisher
Oxford University Press,by American Association of Neuropathologists, Inc
Subject
