Lugano Classification Stage III Adult Non-Hodgkin Lymphoma AJCC v8

This phase I trial studies the safety and side effects of glofitamab plus a chemoimmunotherapy regimen called R-CHOP (rituximab, cyclophosphamide, doxorubicin, vincristine, and prednisone) in treating patients newly-diagnosed with HIV-associated large B-cell lymphoma. Glofitamab is a bispecific monoclonal antibody, which can bind to two different antigens that are expressed by cancer cells (CD3 and CD20) at the same time. This may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. 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. This may help the immune system kill cancer cells. Cyclophosphamide is in a class of medications called alkylating agents. It works by damaging the cell's deoxyribonucleic acid (DNA) and may kill cancer cells. It may also lower the body's immune response. 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. Vincristine is in a class of medications called vinca alkaloids. It works by stopping cancer cells from growing and dividing and may kill them. 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. Giving glofitamab in combination with the R-CHOP regimen may be a safe treatment for patients with newly-diagnosed with HIV-associated large B-cell lymphoma.