In cohort B, the overall response rate of ICIs was significantly higher in patients with high CD73 expression than those with low CD73 expression (66.7% versus 0%, p= 0.006), and the high CD73 expression group showed significantly longer progression-free survival (PFS) than low CD73 group (median 16.0 months versus 1.2 months, p= 0.024)....In patients with EGFR mutation-positive NSCLC, expression of CD73 may predicts a favorable outcome of ICIs treatment unlike in EGFR mutation-negative patients.