Predictive Factors for Lymph Node Metastasis in Clinical Stage IA Lung Adenocarcinoma

Systematic lymph node dissection should be performed in patients with clinical stage IA lung adenocarcinoma with part-solid or pure-solid tumors, especially those with a carcinoembryonic antigen level exceeding 5 ng/dL and a maximum standardized uptake value exceeding 5. The intraoperative diagnosis of histologic subtype may help to identify patients in whom systematic lymph node dissection can be omitted.