CD27 and B-cell chronic lymphocytic leukemia: Moreover, the B cell memory marker CD27 shows higher expression in the ‘CLL-like’ type of MBL compared to ‘atypical’ and ‘CD5-negative’ MBL, while, in contrast, CD22, CD79a, CD79b, and CD1c (BDCA-1) are mainly expressed in the ‘non CLL-like’ types.