BCL6 and lymphoma: The lymphoma was characterized by a cell-of-origin subtype of germinal center B-cell-like (GCB) based on Hans' classifier (CD10-negative, BCL6-positive, and MUM1-negative); EBER negativity, and the absence of <i>BCL2</i>, <i>BCL6</i>, and <i>MYC</i> rearrangements.