CD274 and post-transplant lymphoproliferative disease: Kinch et al investigated the expression patterns of PD1, PD‐L1, and PD‐L2 in 81 PTLD patients after SOT and found positivity for PD‐L1 in two and PD1 positivity in three of five p‐PTLD samples, respectively.24 In our study, we applied the same cut off levels for PD‐L1 expression and observed PD‐L1 positivity in 6 of 7 patients and PD1 positivity in all samples (although there is limited evidence for definite cut‐off levels for PD1 expression).