[Correlation among N factor, mediastinal node excision and prognosis].
D000230:Adenocarcinoma / Q000601:surgery*; D006801:Humans; D008175:Lung Neoplasms / Q000601:surgery*; D008197:Lymph Node Excision; D008207:Lymphatic Metastasis; D008479:Mediastinal Neoplasms / Q000601:surgery*