Low-grade malignant tumors, which may survive for a long time, do not affect the survival period after surgical radical treatment. For example, common low-grade malignant tumors, such as papillary thyroid cancer, can be radically treated by surgery, and after surgery, it can be treated with nuclear iodine-131 therapy, and generally the 5-year survival rate can reach more than 90%, and no recurrence for more than 5 years is considered clinically curable. There are also granulosa cell tumors like pelvic tumors, which are low-grade malignant tumors, and surgery can achieve the effect of radical treatment without adjuvant radiotherapy. Of course, low-grade malignant tumors need to be reviewed periodically, after all, they are malignant lesions and still have the possibility of recurrence or metastasis, but the chances of recurrence and metastasis are lower than other severe malignant tumors. Within 2 years after the surgery, we should review every 3 months, every 6 months from 2 to 5 years, and more than 5 years, we should review once a year.