The first thing needed for the diagnosis of lung cancer is pathological findings. Some people go for a film because they are not feeling well, or they find a shadow inside the lung by chance physical examination. However, just from imaging alone, there is no way to definitively determine whether the shadow or mass is lung cancer or not. It could be tuberculosis, inflammation, or rheumatic immune disease. In order to clarify the benignity or malignancy of this shadow, the most fundamental thing is the pathological diagnosis result. It is unacceptable to treat benign diseases as malignant tumors in clinical practice. There are many ways to obtain pathology, such as surgical resection to obtain pathological specimens, or bronchoscopy or CT-guided puncture to obtain pathology, and possibly lymph node excision biopsy, or sputum examination. Non-invasive tests are usually recommended first, followed by less invasive tests. Eventually, a pathology report will be generated with a series of pathological findings. The minimum content should include whether the tumor is adenocarcinoma, squamous carcinoma, or small cell lung cancer. Patients should always bring their previous pathology report with them when they visit the clinic. For cases where the local diagnosis is less clear or doubtful, it is best to borrow sections from the local hospital pathology department and come to our hospital for re-pathology consultation. In addition, patients who simply wish to obtain a treatment plan at the time of consultation and still return to the local area for treatment may not necessarily bring pathology slides with them. However, for patients who wish to be treated at the Medical Academy Cancer Hospital in the future, it is better to lend the slides and bring them to the consultation.