Neurologic Toxicities of Cancer Immunotherapies: a Review

Purpose of Review: This review provides clinical characterization and approach to management of neurotoxicities associated with checkpoint inhibitor therapy and chimeric antigen receptor T cell (CAR T cell) therapy. Recent Findings: Immuno-oncology has revolutionized cancer treatment. The immunomodulatory effect of these treatments extends beyond the targeted cancers; however, with a range of immune-mediated toxicities being associated with these therapies. Both the peripheral and central nervous system are vulnerable to these toxicities, with several distinct clinical syndromes strongly associated with specific immunotherapies. Summary: Neurologic immune-related adverse events are significant sequelae of both checkpoint inhibitors and CAR T cell therapy. In addition to clinical characterization of these syndromes, an understanding of the biologic underpinnings of these sequelae is essential. This will facilitate identification of patients at risk of these toxicities, develop treatments to prevent them and identify more effective clinical treatment when they occur.