Ar-He knife cryotherapy is an international emerging minimally invasive treatment for tumors, which is called “green treatment” by the international cancer treatment community because of its minimal trauma, painless, non-toxic and high safety features. Ar-He knife is a special rapid freezing device, which can make the temperature around the Ar-He knife decrease rapidly at the rate of 10 degrees Celsius per second after the device is activated, so that the temperature of the tumor around the Ar-He knife can be reduced to below -150 degrees Celsius within ten seconds, thus freezing the tumor around the Ar-He knife completely. Meanwhile, since the antigenicity of frozen necrotic tumor tissues is still preserved, these tissues enter the bloodstream and can stimulate the body’s immune system to produce tumor-related antibodies to further kill the remaining tumor cells and metastatic tumor cells. In western developed countries, especially in the United States, argon helium knife cryotherapy has been widely used in the treatment of most solid malignant tumors such as liver cancer, lung cancer, kidney cancer, prostate cancer, breast cancer, pancreatic cancer, skin cancer, etc. and has achieved better efficacy. Argon Helium Knife treatment technology in China has been carried out in Beijing, Shanghai, Guangdong, Jiangsu, Tianjin, Shandong and other developed provinces along the southeast coast, and has treated tens of thousands of patients in China, relieving many patients from cancer pain. The main reason why Ar-He knife treatment technology is called “green treatment” is that this technology has the following characteristics; i. Less traumatic treatment Ar-He knife can directly penetrate into the tumor through a 2-3mm skin incision under the guidance of CT, ultrasound and other imaging equipment, which almost does not damage the normal tissue structure of human body; ii. Compared with radiofrequency ablation and other methods that kill tumors by high temperature, cryotherapy can make lesions numb and unconscious, so patients can hardly feel any pain during the freezing process and no anesthetic is needed; 3. Ar-He knife cryotherapy can treat most benign and malignant solid tumors, and for patients who have relapsed after surgery and radiotherapy, the treatment can still achieve certain effect, and for patients with poor physical condition, it can also be treated; V. Treatment can be monitored In the process of cryotherapy, the scope of frozen tumor can be observed in real time through CT and other equipment, so it can avoid frostbite of normal tissues, and the safety is high; VI. Treatment can be repeated Because cryotherapy is very less traumatic and painful, so unlike surgery and radiotherapy, this treatment can be repeated many times, which is especially suitable for huge tumors and multiple tumors. As a highly effective and painless tumor ablation treatment, Ar-He knife has achieved impressive results in the treatment of many solid tumors such as liver tumors, lung cancer, prostate cancer, small kidney cancer, etc. As patients’ demands for treatment increase, so do their demands for quality of life. While treating tumors, minimizing the pain incurred during treatment is a higher goal pursued by the oncology community. Compared with other ablative treatments such as radiofrequency ablation, the pain during treatment with Ar-He knife is almost non-existent and therefore more in line with the concept of minimally invasive treatment. It is believed that argon helium knife treatment will bring greater benefits to patients with solid tumors! 1.Liver metastases A and B showed multiple metastases in the liver, and the tumor was completely necrotic after ablation with Ar-He knife. 2.Lung cancer ABCD was a peripheral type of lung cancer in the left lower lung, and EFGH showed that the tumor was completely necrotic after ablation with Ar-He knife. 3.Adrenal metastasis ABCD shows adrenal metastasis of lung cancer, EFGH shows complete necrosis of tumor after cryotherapy 4.Sacral tumor ABCD shows huge tumor of sacrum, pathological biopsy diagnosed as chordoma, EFGH shows most of tumor was ablated by cryoablation