The diagnosis and treatment of malignant tumors have been well established so far, and the following are the preliminary suggestions: Step 1: Is the diagnosis clear? Modern medicine pursues pathological diagnosis, that is to say, malignant tumor cells should be found to confirm the diagnosis. Only in rare cases, the diagnosis is made by X-ray and other means alone. If the diagnosis is not clear, it is difficult to carry out follow-up treatment. Step 2: To what extent? A series of tests should be conducted to (only) accurately grasp the condition before the patient can be recommended for appropriate treatment. Patients and families must keep this in mind. Step 3: How do I receive comprehensive treatment? The vast majority of patients are treated with a combination of treatments. This includes: surgery, chemotherapy, radiation, biologic therapy, etc. However, please note: how to receive the most appropriate treatment for a specific patient must be analyzed. At present, there are various international guidelines for oncology treatment available. When dealing with doctors, please give full play to your own thinking ability on the premise of equality, and make reasonable treatment decisions by yourself with the help of doctors in an informed manner. In conclusion, the above three steps of tumor diagnosis and treatment are indispensable. Under the current medical system of China, the multidisciplinary discussion system of tumor is encouraged to make the tumor treatment more scientific in the system. The oncology center of Gulou Hospital implements the multidisciplinary discussion system twice a week, in which doctors from different directions such as chemotherapy and radiotherapy participate in the discussion of patient treatment, which is well received by doctors and patients. Regarding the treatment after recurrence, it is more important to receive the guidance from oncology specialists. Clinical Oncology, edited by Qian Xiaoping and me, was published by Science Press in 2007, mainly referring to the tumor treatment guidelines of the United States and Germany, with the focus on giving reasonable treatment paths for each tumor and guiding clinicians to practice medicine correctly, which has become a reference book for teaching oncology in colleges and universities. Clinical oncology is by far the most rapidly developing discipline, and oncologists also need to study diligently in order to provide scientific and reasonable treatment to patients.