Lymphoma is a type of cancer that affects the blood and lymphatic system, which is a part of the body's immune system. This study focuses on understanding how lymphoma develops and what might happen to people who have it. Researchers are looking at Chinese patients' medical and genetic information to find patterns and clues about the disease.

Participation involves sharing your existing medical records, including details about your lymphoma diagnosis, treatments you've had, and any side effects or outcomes. This study does not involve new treatments or medications, so there are no risks from new interventions.

• **Length**: The study observes data from 2007 to 2027.
• **Visits**: No new hospital visits are needed; it's based on your existing records.
• **Consent**: You must agree to share your medical information and sign a consent form.

To join, you need to have a confirmed diagnosis of lymphoma with complete medical records. You cannot join if you have severe mental illness or if you cannot use contraception when needed. This study helps researchers learn more about lymphoma, potentially improving future treatments.