There are more confirmatory examinations for lung cancer, as follows: 1. imaging examinations, such as chest CT, enhanced CT, PET-CT, can see the mass with burr-like changes; 2. if the tumor is near the lung gate, also called central lung cancer, bronchoscopy can be done and then further pathological examination; 3. if the mass is around the lung, lung puncture can be done and further pathological testing should also be done; 4. if some patients If there is a cavity effusion, chest fluid can be used for laboratory tests to find cancer cells and then do pathological tests; 5. There are more examination items for lung cancer, which can be performed according to each individual’s specific conditions.