EGFR and non-small cell lung carcinoma: In EGFR-T790M negative NSCLC, the PFS and OS of the patients with PE were comparable to those of the patients without PE (median PFS 19.8 vs. 19.8 months, p = 0.693; median OS NR vs. NR, p = 0.712) (Figs. 2A and 3A).