Feasibility of Targeted Bronchial Washing for Molecular Testing by Next Generation Sequencing in Early-stage Lung Cancer

1. Inclusion Criteria: * Age ≥ 20 years * Obtained written informed consent * Subjects suspected of having resectable lung cancer on computed tomography * Subjects without contraindication to brochoscopy * Subjects planning to undergo surgery for suspected lung cancer and opting for tissue or liquid biopsy for genetic alteration using Next Generation Sequencing 2. Exclusion Criteria: * Subjects who withdraw informed consent * Subjects who are unable to undergo liquid biopsy (plasma) and tissue biopsy - for genetic alteration with Next Generation Sequencing based on the investigator's judgement * Subjects diagnosed with a cancer other than non-small cell lung cancer from the lung tissue lesion * Subjects diagnosed with a benign lesion from the lung tissue lesion