A Single-center Study on the Effect of Systemic/Selective Lymph Node Dissection on the Prognosis of Ground Glass Nodules Smaller Than 3cm and With Components With Consolidation/Tumor Ratio Between 0.5-1

Inclusion Criteria:

Patients enrolled in the study must meet all of the following conditions:

* 1.Aged between 25 and 75 years;
* 2\. GGO is diagnosed by thin-section lung CT (thickness \<1.5mm) within one month before surgery;
* 3\. The maximum diameter of the GGO is smaller than 3cm;
* 4\. The solid component in GGO between 50%-100%;
* 5\. Preoperative examination showed that the patient could tolerate lobectomy;
* 6\. The patient is able to understand and comply with the study and has provided written informed consent.

Exclusion Criteria:

Patients meeting any of the following criteria are not eligible for this trial:

* 1\. Patients with a history of lung surgery;
* 2\. Postoperative pathology showed non-primary lung cancer;
* 3\. The scope of surgical resection is larger than one lung lobe;
* 4\. Patients with a history of other tumors;
* 5\. Patients with severe complications (coronary heart disease, valvular heart disease, end-stage renal disease, severe liver cirrhosis);
* 6\. Unable to cooperate with the researchers because of dementia or cognitive decline
* 7\. Other situations that are not in conformity with the standards and requirements of this trial.