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Visceral pleural invasion (VPI) is considered an adverse prognostic factor in non-small cell lung cancer (NSCLC). However, the prognostic roles of VPI in Ⅲ/N2 NSCLC remain controversial. Therefore, this study aims to evaluate the prognostic value of VPI in patients with postoperative stage pT N M NSCLC. Using the Surveillance, Epidemiology, and End Results (SEER) database, we screened for patients with stage T1-2N2M0 NSCLC who received surgery from 2010 to 2015. To reduce baseline differences between Non-VPI group and VPI group, two-to-