SEgmentectomy Versus Lobectomy in T1C Non-Small Cell Lung Cancer (SELTIC)

Inclusion Criteria: * Clinical T1c NSCLC * Parenchymal nodule \>2 cm in diameter * Parenchymal nodule ≤3 cm in diameter * Consolidation / Tumor Rate (CTR) ≥ 0.50 * Definitive pathological diagnosis of NSCLC preoperative or intraoperatively * No evidence of distant metastasis * No evidence of N2 disease * Adequate pulmonary functions for lobectomy or segmentectomy Exclusion Criteria: * Pure GGO lesions * Pathologic diagnosis other than NSCLC * Technically not suitable for simple or complex segmentectomy, or lobectomy * Evidence of distant metastasis * Pathologically confirmed N2 or N3 disease * Major comorbidity that precludes surgery * Intraoperative mediastinal nodal dissection of less than 3 lymph node stations * Prior malignancy in five years