CD274 and peripheral T-cell lymphoma, not otherwise specified: Preclinical studies have suggested that T-cell lymphoma has a higher expression rate of PD-L1 than B-cell lymphoma, and the expression rates of PD-L1 in extranodal NKTCL and peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS), were 39% and 26%, respectively.5