T-Cell/Histiocyte-Rich Large B-Cell Lymphoma

This phase II trial tests the safety, best dose, and effectiveness of epcoritamab when given with etoposide, cyclophosphamide, vincristine, doxorubicin, prednisone and rituximab (EPOCH-R) for the treatment of patients with aggressive B-cell non-Hodgkin lymphoma. Epcoritamab is a bispecific antibody that can bind to two different antigens at the same time. Epcoritamab binds to CD3, a T-cell surface antigen, and CD20 (a tumor-associated antigen that is expressed on B-cells during most stages of B-cell development and is often overexpressed in B-cell cancers) and may interfere with the ability of cancer cells to grow and spread. Etoposide is in a class of medications known as podophyllotoxin derivatives. It blocks a certain enzyme needed for cell division and DNA repair and may kill cancer cells. Cyclophosphamide is in a class of medications called alkylating agents. It works by damaging the cell's DNA and may kill cancer cells. It may also lower the body's immune response. Vincristine is in a class of medications called vinca alkaloids. It works by stopping cancer cells from growing and dividing and may kill them. Doxorubicin is in a class of medications called anthracyclines. Doxorubicin damages the cell's DNA and may kill cancer cells. It also blocks a certain enzyme needed for cell division and DNA repair. Prednisone is in a class of medications called corticosteroids. It is used to reduce inflammation and lower the body's immune response to help lessen the side effects of chemotherapy drugs. Rituximab is a monoclonal antibody. It binds to a protein called CD20, which is found on B cells (a type of white blood cell) and some types of cancer cells. The EPOCH-R is administrated as the standard of care treatment. This may help the immune system kill cancer cells. Giving epcoritamab with EPOCH-R may be safe, tolerable, and effective in treating patients with aggressive B-cell non-Hodgkin lymphoma.

This research study is evaluating the combination of drugs, pembrolizumab with chimeric antigen receptor (CAR) T-cell therapy, as a possible treatment for primary mediastinal B-cell lymphoma that has recurred after prior treatment. The names of the study drugs involved in this study are: \- Pembrolizumab Standard treatment will include: * CAR T-cell therapy (either axicabtagene-ciloleucel or lisocabtagene maraleucel) * Cyclophosphamide * Fludarabine

This phase I trial studies the side effects of polatuzumab vedotin when given with combination chemotherapy with or without glofitamab for the treatment of patients with untreated large B-cell lymphoma that grows and spreads quickly and has severe symptoms (aggressive). Polatuzumab vedotin is a monoclonal antibody, polatuzumab, linked to a toxic agent called vedotin. Polatuzumab attaches to CD79B positive cancer cells in a targeted way and delivers vedotin to kill them. Glofitamab is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. A monoclonal antibody is a type of protein that can bind to certain targets in the body, such as molecules that cause the body to make an immune response (antigens). Drugs used in combination chemotherapy such as etoposide, cyclophosphamide, and doxorubicin work in different ways to stop the growth of cancer cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Rituximab is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. Anti-inflammatory drugs, such as prednisone, lower the body's immune response and are used with other drugs in the treatment of some types of cancer. Giving polatuzumab vedotin in combination chemotherapy with or without glofitamab may help treat patients with aggressive large B-cell lymphoma.