Lung cancer is a type of malignant tumor, so whether it can be cured depends on the circumstances and can only be assessed over time. If the patient is eligible for surgery and there is no recurrence or metastasis after the operation, then adjuvant radiotherapy and chemotherapy may be effective. If the evaluation after treatment shows no recurrence or metastasis and the condition is stable, then naturally, the patient's five-year survival rate will be higher. However, if there is recurrence or metastasis after surgery and the cancer is not very responsive to radiotherapy and chemotherapy, then the five-year survival rate will be much lower. The same applies to small cell lung cancer. Generally, small cell lung cancer is more responsive to radiotherapy and chemotherapy, but if it is not, then the five-year survival rate is also low. Thus, this question can only be addressed by considering the individual's pathology stage, nutritional status, physical condition, cardiopulmonary function, and many other factors. It cannot be broadly answered.