The probability of an ovarian teratoma being benign is about 95% or more. Ovarian teratoma is one of the most common germ cell tumors in women. Among them, mature teratomas are benign tumors, also known as dermoid cysts. Mature teratomas account for 10% to 20% of ovarian tumors, 85% to 97% of germ cell tumors, and more than 95% of ovarian teratomas. However, mature teratoma also has the possibility of malignant transformation, the malignant transformation rate is 2%~4%, mostly seen in postmenopausal women. Ovarian immature teratoma is a malignant tumor, mostly seen in young patients. Since ovarian teratoma has certain malignant potential, patients should consult a doctor in time and receive individualized treatment under the guidance of a professional doctor according to their personal situation.