CD274 and neoplasm: Furthermore, in a previous case of an unresectable lung tumor with a high PD-L1 expression (tumor proportion score - 90%), a 30 gray palliative irradiation was performed, which was suggested to have an abscopal effect; the same was observed in our patient.[9] Although there are no clinical studies on the antitumor effects of APC, studies on a combination of APC and various immune modulators are required.