The Accuracy of Targeted Lymph Node Dissection of Non-small Cell Lung Cancer Patients According to Predictive Models

Inclusion Criteria:

1. Age range from 18 to 70 years old;
2. Chest CT shows a single pulmonary nodule, which may be adenocarcinoma or squamous cell carcinoma;
3. Chest CT shows multiple pulmonary nodules, but preoperative evaluation suggests that pulmonary nodules other than the main lesion are benign;
4. Preoperative auxiliary examination evaluates the patient as clinically resectable lung adenocarcinoma or squamous cell carcinoma in stages I, II, or IIIA (UICC-TNM 9th edition);
5. ECOG score 0-1;
6. Preoperative lung function FEV1 ≥ 1.0L and actual/expected value ≥ 80%;
7. No contraindications for surgery;
8. Technically, lobectomy or segmental resection combined with lymph node dissection can be performed;
9. Preoperative plain scan and enhanced chest CT examination;
10. The interval between surgery and chest CT, lung function, and electrocardiogram examinations is less than or equal to 28 days;
11. The patient signs a written informed consent form.

Exclusion Criteria:

1. Chest CT suggests multiple primary lung cancer or metastatic cancer;
2. Previous history of thoracic surgery;
3. Previous history of malignant tumors;
4. History of neoadjuvant therapy;
5. A history of severe heart failure, myocardial infarction, cerebral infarction, and pneumonia within 6 months prior to surgery;
6. Concurrent active bacterial or fungal infections;
7. Severe underlying lung diseases such as interstitial lung disease, pulmonary fibrosis, or emphysema are complicated;
8. Concomitant mental illness;
9. Pregnant/lactating women.