Inclusion Criteria:  Over 18 years old Eligible for treatment with CAR-T cells (outside any clinical trial) in an indication of DLBCL and for which treatment is scheduled Follow-up in the Hematology department of the Hospices Civils de Lyon Without major psychiatric disorder likely to interfere with the conduct of the study, in the opinion of the investigator Having given his non-opposition to participate in the study.  Exclusion Criteria:  In an institution Under legal protection