Recurrence occurs with any ovarian tumor surgery, including teratomas. Benign, single presenting tumors are less likely to recur. If there are multiple, malignant tumors, the recurrence rate is higher. There are a lot of single tumors in the clinic nowadays, and once the surgery is finished, basically the recurrence rate is very low, while the recurrence rate of multiple tumors is high. If it is malignant, it depends on its stage. If it is in the early stage, the treatment effect is better. In the late stage, it is more likely to have metastasis elsewhere, and the chance of recurrence is higher. Therefore, the discovery of ovarian teratoma should be done in time, timely treatment, do not wait until it grows very large, or even turned into malignant. When it is malignant at the beginning, it is not treated timely and reasonably, which is not favorable to the patient.