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Different patterns of p27 and Ki67 protein expression in aggressive B-cell lymphomas. A: p27 expression of case LB17, considered to be negative. P27 expression could only be seen in small lymphocytes. B: Ki67 expression in the same case (LB17). C: p27-positive (+) case (LB47) with the corresponding Ki67 immunostaining (D). E: A highly p27-positive (++) case (LB169), also displaying high Ki67 protein expression (F).
