POU2AF1 and B-cell non-Hodgkin lymphoma: We present a case of pan-B cell marker negative, EBV positive diffuse large B cell lymphoma that is positive for OCT2, BOB1, and clonal immunoglobulin gene rearrangement that does not meet diagnostic criteria for any B cell lymphoma by current 4th and 5th Ed beta version WHO Hematolymphoid Tumors classification.