Loncastuximab Tesirine and Rituximab Followed by DA-EPOCH-R for Treating Patients With High-Risk Diffuse Large B-cell Lymphoma

PRIMARY OBJECTIVE: I. To obtain a preliminary estimate of the anti-tumor activity of loncastuximab tesirine and rituximab (lonca-R) in newly diagnosed double-expressor lymphoma (DEL) and double-hit lymphoma (DHL). SECONDARY OBJECTIVES: I. To obtain additional efficacy measures of lonca-R in newly diagnosed DEL and DHL. II. To assess safety and tolerability of lonca-R followed by dose-adjusted doxorubicin, etoposide, vincristine, cyclophosphamide, and prednisone (DA-EPOCH-R) as coded by Common Terminology Criteria for Adverse Events (CTCAE) version (v) 5.0. OUTLINE: Patients receive rituximab intravenously (IV), loncastuximab tesirine IV, etoposide IV, doxorubicin IV, vincristine IV, prednisone orally (PO), and cyclophosphamide IV on study. Patients also undergo collection of blood samples and bone marrow aspiration and biopsy at screening and computed tomography (CT) or positron emission tomography (PET)/CT at screening, throughout the study, and during follow up.