In early April last year, Mr. Wang went to the hospital with cough, blood in the sputum, shortness of breath and chest tightness, etc. The doctor diagnosed “right central lung cancer and mediastinal lymph gland metastasis”, the malignant tumor at the right lung door is about 6cm x 5.5cm. Because the cancer has metastasized, the patient is extremely weak and can not perform open-heart surgery. The doctor said only about 6 months of survival time, Mr. Wang and his family took the attitude of trying, to Beijing Second Artillery General Hospital to receive gamma knife treatment. After six consecutive treatments, Mr. Wang’s cough, shortness of breath symptoms significantly reduced, coughing sputum without blood. On the 17th day after discharge, Mr. Wang did a CT review and found that the mass at the right lung door had shrunk to 3.0 cm × 3.5 cm, and the metastatic lymph glands at the mediastinum disappeared. 3 months later, the CT review showed that the mass had completely disappeared. In the following year, repeatedly re-examined, the cancer has not recurred, Mr. Wang’s weight has increased by 10 kg, and his spirit has improved. Gamma knife is a typical representative of stereotactic radiosurgery, is a new technology to destroy and kill various tumor lesions. Ordinary radiotherapy seriously damage the normal tissue of the disease. Gamma knife radiotherapy treatment process is computer-controlled, precise, safe, reliable, precise efficacy, no damage to normal tissue. The treatment is simple and time-saving, taking a few minutes to a few minutes, without blood transfusion and medication after the operation, without dietary and activity restrictions, and patients generally do not need to be hospitalized.