Low-grade malignant tumors refer to tumors with relatively low malignancy, which may not have extensive invasion and spread, and some of these types of malignant tumors are more effective in treatment. For example, ovarian granulosa cell tumor, which belongs to low-grade malignancy, and low-risk gastrointestinal mesenchymal tumor belong to low-grade malignancy. Through surgical radical treatment, adjuvant radiotherapy and chemotherapy can be dispensed with after surgery, and only regular review is required to achieve radical treatment, and many of them have not recurred for more than 5 years. Of course, low-grade malignant tumors may also develop, with local recurrence or distant metastasis, and close follow-up is needed regardless of whether surgery is done or not. Surgery for low-grade malignant tumors is definitely more effective and is the preferred treatment modality.