This study tests the combination of nivolumab with chemo-immunotherapy for treating Primary Mediastinal B-Cell Lymphoma (PMBCL), a type of blood cancer. Nivolumab is a medicine called a monoclonal antibody that helps the immune system fight cancer cells. The trial compares this combination to just chemo-immunotherapy, which includes drugs like rituximab that also help the immune system. The main goal is to see if the combination helps patients survive longer without the cancer coming back.
- Study Length: 6 cycles of treatment, each lasting 21 days.
- Visits and Tests: Involves regular hospital visits, blood tests, and scans like CT or PET.
- Eligibility: Available for both kids (age 2+) and adults with specific health conditions.
Participants will be randomly assigned to different groups receiving different treatments. They will be closely monitored with tests and scans throughout the study. Follow-up visits will occur for several years after treatment to track progress and health.