In 2017, the US Food and Drug Administration approved the first chimeric antigen receptor (CAR) T-cell therapies for patients with relapsed or refractory B-cell leukemia and selected B-cell lymphomas. This novel form of cellular immunotherapy creates a "living drug" that effectively reprograms a patient's T cells to target specific antigens on the surface of a tumor. The therapy has high response rates in patients with refractory disease, although a single infusion of CAR T cells costs hundreds of thousands of dollars. A value analysis is required to determine whether and how to offer patients these expensive, customized drugs.
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