Looking at Cognitive and Brain Changes in People With Lymphoma Receiving CAR-T Therapy

This study is looking at how a type of immunotherapy called CAR-T cell therapy affects the brain and thinking abilities in people with lymphoma. Researchers want to understand any cognitive (thinking and memory) changes that may happen before, during, or after treatment. **You may be eligible if...** - You are 18 years old or older - You are scheduled to receive a CAR-T cell therapy (such as axicabtagene ciloleucel, tisagenlecleucel, lisocabtagene maraleucel, or brexucabtagene autoleucel) for lymphoma - You are able to communicate well in English **You may NOT be eligible if...** - Your lymphoma has spread to the brain or spinal fluid - You have been diagnosed with a major psychiatric condition such as schizophrenia or bipolar disorder - You have a history of a degenerative brain disease or a significant head injury with prolonged loss of consciousness Talk to your doctor to see if this trial is right for you.