CD274 and non-Hodgkin lymphoma: Similar to previous data, we showed that a subset of PD-L1+ lymphomas (both cHL and non-Hodgkin lymphoma) may harbor genetic alterations at 9p24.1 amplicon, which implies that the remaining non-amplified cases may have “adaptive” PD-L1 overexpression without underlying PD-L1 gene alterations [15].