Other studies have shown PD-L1 overexpression in diffuse large B cell lymphoma (DLBCL), follicular lymphoma, peripheral T-cell lymphoma [26,27], multiple myeloma (MM) [28], chronic lymphocytic leukemia (CLL) [29], and acute myeloid leukemia (AML) [30]. This evidence concerns the gene CD274 and B-cell chronic lymphocytic leukemia.