Figure 1. Serial PET scans demonstrating the relapsed Hodgkin’s lymphoma and treatment response. (a) PET scan showing disease progression with disseminated skeletal and visceral involvement after BV treatment. (b) Disease significantly controlled by anti-PD-1 treatment. (c) Multiple nodal and bony relapses following 16 months of remission. (d) Remission state regained after anti-PD-1 and BV combination treatment. PET: positron emission tomography; BV: brentuximab-vedotin; PD-1: programmed cell death protein-1.