CD274 and neoplasm: In the ICI monotherapy regimen group, the median age was 68 (range: 43–85) years, 21 patients (50.0%) were of male sex, 14 (33.3%) had ECOG PS 2/3, 16 (38.1%) had a history of smoking, and nine (21.4%) had a PD-L1 tumor proportion score more than or equal to 50%.