Central lung cancer, also known as central lung cancer, refers to lung cancer located above the lung segments, and common pathological types include small cell lung cancer and squamous cell carcinoma. Centralized lung cancer is closely related to smoking and is mostly seen in elderly men. Its symptoms mainly include coughing, coughing up sputum, hemoptysis or blood in sputum, dyspnea, chest pain, hoarseness and so on. Its diagnostic methods mainly include bronchoscopy, sputum searching for tumor cells, percutaneous lung puncture biopsy and thoracoscopy. Central type lung cancer needs to be differentiated from tuberculosis, tuberculosis, inflammatory pseudotumor, lung abscess, cryptococcal lung infection and so on. Treatment is mainly based on surgery, systemic chemotherapy and local radiotherapy. Precautions: If imaging suggests that central lung cancer is possible, it is necessary to consult a regular hospital as soon as possible and complete relevant examinations to clarify the nature of lesions for regular treatment.