The patients with CD155 positive had a significantly worse response to αPD1 therapy compared to CD155 negative patients (ORR: 25.6% vs 54.8%, P<0.01; median PFS: 5.1 vs 7.1 months, HR=2.322; 95% CI 1.396-3.861, P=0.001). This effect is more prominent in PD-L1 positive patients. In PD-L1 positive patients, CD155 expression is associated with a poor response to αPD1 therapy in both LUAC (lung adenocarcinoma) and LUSC (lung squamous cell carcinoma)...