Pembrolizumab After ASCT for Hodgkin Lymphoma, DLBCL and T-NHL

Pembrolizumab is an antibody drug that blocks a molecule called PD-1. PD-1 is a receptor molecule on the surface of immune cells that can be used to turn off the immune response. Some cancers use this as a way to turn off the immune response against them. Blocking PD-1 with pembrolizumabmay restore an effective immune attack against the lymphoma cells. On this study, patients who undergo ASCT for R/R cHL, DLBCL or PTCL in 1st remission will receive pembrolizumab at a dose of 200mg intravenously every 3 weeks for up to 8 cycles, beginning within a few weeks of ASCT.