The investigators conducted a muti-centres randomized controlled clinical trial to explore the effect of preservation of inferior pulmonary ligment compared with dissection.

Dissection of the inferior pulmonary ligament (IPL) has been a common practice in upper lobectomy to facilitate the expansion of the remaining lung, reduce dead space after resection, and minimize complications such as pleural effusion and pulmonary infection. However, studies have found that IPL dissection does not improve patient outcomes. On the contrary, releasing the restriction may lead to excessive movement of the remaining lobes, resulting in significant changes in bronchial angles and lung volume, which can worsen pulmonary function and increase postoperative symptoms. Most existing studies are retrospective, providing relatively low-level evidence. Moreover, previous research has primarily focused on radiographic outcomes and pulmonary function tests results, while the effect on patients' symptom burden has been largely overlooked. From the patient's perspective, symptom burden might be more significant, reflecting the clinical value of changes in radiographic and functional indices. In this study, the investigators applied patient-reported outcomes to measure symptoms. Combined with pulmonary function results and radiological outcomes, the investigators compared the clinical value of preserving versus dissecting the IPL in upper lobectomy.

Inclusion Criteria:

1. Patients underwent upper lobe resection
2. Patients could complete our questionnaires

Exclusion Criteria:

1. Previous history of ipsilateral lung surgery
2. Patients who underwent pleurodesis