Chimeric antigen receptor T-cell therapy in patients with neurologic comorbidities.

Chimeric antigen receptor T cells (CAR-T) are an effective and potentially durable treatment for refractory and multiply relapsed B-cell acute lymphoblastic leukemia. Neurotoxicity is frequent after CAR-T cell therapy. Mechanisms driving neurotoxicity are incompletely understood, and symptoms can range from transient and mild to severe and life-threatening. Providers have exercised caution in providing CAR-T to patients with neurological comorbidities or extramedullary disease. Here, we report three patients with prior significant neurologic morbidity who safely tolerated CAR-T cell infusion after bridging therapy with conventional chemotherapy.