Benign tumors are rarely irregular and are usually more regular. Benign tumors have a relatively complete envelope on the outside, which can envelop the benign tumor inside. It has clear borders, does not adhere to other surrounding tissues, and the surface may be smooth and moveable to touch. There are also benign tumors that are lobulated, which may not be too regular, but may also have an envelope outside. A very small percentage of benign tumors may be associated with inflammatory infection and mild adhesion to surrounding tissues, but the tumor will not infiltrate or metastasize to other places, which is a significant difference from malignant tumors. This is a significant difference between benign and malignant tumors. The initial identification of benign tumors and malignant tumors can be based on appearance, but the specific determination of the nature depends on pathological examination. If it is malignant tumor, in addition to surgery, other comprehensive anti-tumor treatments such as radiotherapy and chemotherapy are needed.