Study of Brexucabtagene Autoleucel (KTE-X19) for the Treatment of Individuals With Relapsed/Refractory B-Cell Malignancies

This is an open-label, expanded access study of KTE-X19 for the treatment of individuals with r/r B-cell malignancies. The study will consist of 2 cohorts as indicated below: Cohort 1 will enroll individuals prior to commercial availability of KTE-X19 for the proposed indication. Cohort 2 will enroll individuals after KTE-X19 becomes commercially available in cases when KTE-X19 does not meet commercial release specification(s). The participants who received an infusion of KTE-X19 will be provided the opportunity to transition to a separate long-term follow-up (LTFU) study, KT-US-982-5968.