Long-term Follow-up of Subjects Treated With CAR T Cells

This study is following patients long-term after they received CAR T-cell therapy — a type of cancer immunotherapy that uses genetically modified immune cells — in another clinical trial. The goal is to monitor health outcomes and any late-developing effects over many years. You may be eligible if: - You are 18 years or older - You received CAR T-cell therapy as part of an approved clinical trial at DF/HCC - You provided voluntary written informed consent You may NOT be eligible if: - You are unable to comply with the study requirements Talk to your doctor to see if this trial is right for you.