The effectiveness of chemotherapy for central lung cancer is related to the type of pathology, because central lung cancer is not classified by pathological typology, but by the site where the tumor occurs. It may be non-small cell lung cancer, such as squamous carcinoma or adenocarcinoma, and squamous carcinoma may be more common in central lung cancer. It may also be small cell lung cancer, and if it is small cell lung cancer, chemotherapy will work very well. Although small cell lung cancer has a fast growth cycle, fast disease progression and high malignancy, it is very sensitive to chemotherapy, and the efficiency of first-line chemotherapy drugs may be very high, and the statistical results are not exactly the same from center to center. For non-small cell lung cancer chemotherapy, the efficiency is relatively low, and the efficiency of first-line non-small cell lung cancer chemotherapy may be around 40%. Depending on the type of pathology, the efficiency may also be different. Doctors will choose whether to do chemotherapy and choose the appropriate chemotherapy regimen based on the type of pathology, stage and the general condition of the patient.