We describe a patient with a primary diffuse large B-cell lymphoma of the central nervous system who developed a localized testicular relapse after 8 years. Both tumours lacked HLA-DR expression. the relapse additionally lost HLA class I expression. Immunoglobulin heavy chain gene rearrangements were identical in both lymphomas with extensive and ongoing somatic hypermutations resulti... https://www.roneverhart.com/POISON-OPEN-UP-AND-SAY-AHH-T-SHIRT/