CD274 and extranodal nasal NK/T cell lymphoma: PD-L1 expression was found in different T-NHL subtypes, including PTCL (15% of cases), CTCL (27%), NKTCL (67%), ATL (25%), ALKpos ALCL, and ALKneg ALCL (50% and 67%, respectively) [64,65,66,67,68].