Keywords: تجزیه گره لنفاوی مدیاستین; CEA; carcinoembryonic antigen; CT; computed tomography; CTR; consolidation tumor ratio; GGO; ground glass opacity; h-LND; hilar lymph node dissection; LND; lymph node dissection; m-LND; mediastinal lymph node dissection; NSCLC; non-small cell lung cancer;