CD5 and lymphoma: Immunohistochemical results of the transformed lymphomas were as follows: CD10, 24% (8/33); Bcl-6, 50% (17/34); MUM1, 65% (20/31); MYC, 30% (6/20); Bcl-2, 79% (27/34); CD5, 32% (9/28); and Ki67 ≥ 60%, 53% (18/34).