The specific appearance of malignant tumors are as follows: 1. There may be lump-like and cauliflower-like manifestations, similar to the form of cauliflower eaten, with broken surface and easy bleeding; some malignant tumors show just broken envelope, irregular shape mainly, adhering with surrounding tissues, and different malignant tumors have different appearance; 2. Some manifest ulcerative lesions, such as esophagus, stomach or colorectum, may have malignant ulcers, which also belong to malignant tumors; 3. Malignant tumors with different sources also have different performances, like sarcoma may appear as a lump with smooth surface but infiltrated and adhered to surrounding tissues. After malignant tumors are found, they need to adopt a comprehensive treatment plan based on surgical radical treatment, including radiotherapy and chemotherapy.