CD274 and diffuse large B-cell lymphoma: Kohno et al.65recently reported interesting findings that may account for the clinical characteristics of CHL type MTX‐associated LPD. They performed a PD‐L1 immunohistochemical assessment in a series of MTX‐associated LPDs, including CHL type (n = 9), DLBCL type (n = 15), and polymorphic B‐LPD type (n = 21).