Generally speaking, the chance of malignancy of ovarian tumor is not judged by the size, but mainly diagnosed by pathological results. Ovarian tumor more than 10 centimeters, indicating that the current ovarian tumor is relatively large, may cause some corresponding clinical symptoms, such as abdominal pain or menstrual disorders and so on, but can not be based solely on the size of the judgment of benign or malignant. If the ovarian tumor is benign, it can be surgically removed, and it is not easy to recur after the operation, and it is not easy to leave other sequelae. If it is a malignant tumor of the ovary, it needs to be operated first, and it needs to be further treated with radiotherapy or chemotherapy after the operation, and the malignant tumor of the ovary of this size may metastasize to other parts of the body. Ovarian tumor of 10 centimeters should cooperate with the doctor in time to take further examination, clear diagnosis and then treatment.