Recurrent Polymorphic Post-Transplant Lymphoproliferative Disorder

This phase II trial tests how well the combination of epcoritamab and lenalidomide work in treating patients with immunodeficiency-related large B-cell lymphoma that does not respond to treatment (refractory) or that has come back after a period of improvement (relapsed). Epcoritamab is an immunotherapy that engages T-cells in the immune system to help redirect their killing effects against lymphoma cells. Lenalidomide can modulate the immune system to enhance killing effects of lymphoma by the immune system as well. Giving patients a combination of epcoritamab and lenalidomide may work better in treating refractory or relapsed immunodeficiency-related large B-cell lymphoma.

This phase Ib trial tests the safety and effectiveness of epcoritamab in treating patients with post-transplant lymphoproliferative disorder (PTLD) that has come back after a period of improvement (relapsed) or has not responded to previous treatment (refractory). Epcoritamab, a bispecific antibody, binds to a protein called CD3, which is found on T cells (a type of white blood cell). It also binds to a protein called CD20, which is found on B cells (another type of white blood cell) and some lymphoma cells. This may help the immune system kill cancer cells. Giving epcoritamab may be safe and effective in treating patients with relapsed or refractory B-cell PTLD.