A Study to Explore Clinical Characteristics and Prognoses of N2 Patients With Non-small Cell Lung Cancer

A Multi-centre Real-world Non-interventional Observational Study to Explore Clinical Characteristics of Lymph Skip Metastases and Prognoses of N2 Patients With Non-small Cell Lung Cancer

A study to compare patient survivals in the N2 patients with non-small cell lung cancer in the subgroups of lymph skip metastases and non-skip metastases

A multi-centre real-world non-interventional observational study to retrospectively collect the study data on patient demographic/tumor biological characteristics and clinical treatments to compare patient survivals in the N2 patients with non-small cell lung cancer in the subgroups of lymph skip metastases and non-skip metastases.

Inclusion Criteria:

• Patients with surgeries from 2014 to 2017;
• Pathologically diagnosed patients with non-small cell lung cancer;
• Age > 18 years old;
• Patients with chest surgeries before hospitalization;
• Patients with N2 lymph nodes (+) after surgeries who received lymphadenectomy (Group 10 and 11 lymph nodes);

Exclusion Criteria:

- Patients with radiotherapies, chemotherapies and biological therapies for tumors