CD274 and diffuse large B-cell lymphoma: Kiyasu et al31 investigated PD1 expression in 236 patients with DLBCL and found lower numbers of PD1‐positive cells in DLBCL of the activated B‐cell subtype [10 of 11 (91%) of our cases: non‐GCB subtype] as well as in DLBCL with high (≥30%) PD‐L1 tumor cell positivity, which reflects our findings of an inverse behavior of the two proteins.31 However, conflicting results with a positive correlation of PD1‐positive cells with PD‐L1 expression of tumor cells and/or macrophages have been reported by others, as well.25, 32