When chemotherapy and radiation fail, some adult patients with B-cell non-Hodgkin lymphoma or children with acute lymphoblastic leukemia have a new treatment option called CAR T cell therapy. Yescarta is the CAR T cell therapy that’s FDA-approved to treat patients with B-cell non-Hodgkin lymphoma; it shrinks the tumors in 70-80% of patients.

But with this new therapy come side effects that are different from those of other cancer...