Patients will be tested for the status of EGFR-sensitive mutations prior to enrollment and confirmed positive by central laboratory testing.The surgically removed tumor foci will be confirmed by central laboratory pathologic examination for their pathological subtypes, solid and/or micropapillary components ≥10%, and/or STAS positive.~These patients had undergone complete resection of the tumor, and 65 patients who met the criteria for inclusion were enrolled to receive Osimertinib. Patients had to be enrolled and given Osimertinib within 10 weeks of complete resection.The dose of Osimertinib in this study was 80 mg once a day and the planned duration of treatment was 3 years (156 weeks). Patients will be evaluated for safety and efficacy at baseline, at week 12, and every 12 weeks thereafter until completion or termination of treatment. Patients were followed up every 24 weeks to 5 years (264 weeks) and annually thereafter for disease recurrence.~Overall survival (OS) was observed every 24 weeks for 5 years (264 weeks) after disease recurrence and annually thereafter.The primary endpoint of the study was 3-year DFS rate. Disease-free survival (DFS) should be calculated from the date of entry on Osimertinib to the date of disease recurrence or death.~After the primary analysis (3-year DFS rate), patients' survival status will be followed up according to the simplified study plan (OS analysis period) until the final OS analysis data is available. In the event of disease recurrence, patients will be re-staged and all sites of recurrence of NSCLC will be recorded. It will be up to the doctor to decide what treatment the patient will receive after a relapse;and cancer treatment after recurrence will be documented.Taken together, all primary, secondary, and exploratory endpoints in this study strongly describe the overall benefit of adjuvant Osimertinib in a population of patients with high-risk EGFRm+ stage I NSCLC who have been surgically completely resected.
This is a prospective, open, single-center, single-arm phase II clinical study with common EGFR-sensitive mutations (Ex19del and L858R) identified in the central laboratory.To evaluate the efficacy and safety of adjuvant Osimertinib therapy in completely resected stage I non-squamous non-small cell lung cancer (NSCLC) with high-risk factors (solid and/or micropapillary component ≥10%, and/or airway spread).