This study reviewed a series of consecutive patients with stage IB NSCLC who had been operated on in a single institution according to the new IASLC/ATS/ERS classification.It tracked the relationship between the predominant subtype of adenocarcinoma and prognosis, in addition to detecting the Correlation between the new subtype ofadenocarcinoma and EGFR mutations. Here, EGFR is linked to adenocarcinoma.