RecruitingPhase 2Drug trialOsimertinib to Suppress the Progression of Remaining GGN for EGFR Mutation-positive Stage IB-IIIA Lung AdenocarcinomaThis is an open label, phase II study to assess the efficacy of osimertinib (80 mg, orally, once daily) to suppress the progression of remaining GGN(s) in other lobes following surgical resection for actionable EGFR mutation-positive stage IB-IIIA lung adenocarcinoma.