However in our study, we found that PD-L1-positive cells including rare malignant Hodgkin and RSC cells do not express CD20 (the marker of B-cell lineage) neither in Hodgkin lymphoma (Additional file 4: Fig. S2) nor in AITL (Additional file 6: Fig. S4). This evidence concerns the gene CD274 and angioimmunoblastic T-cell lymphoma.