Ovarian teratomas are congenital, germ cell tumors that form as a result of the deposition of some undifferentiated cells in the ovary during the growth and development of the embryo, and gradually grow in size after puberty. Most women may not experience discomfort, but may experience more severe lower abdominal pain if there is torsion or bleeding. Mature teratomas are mostly benign and contain more fetal fat, hair, bone and other embryonic tissues, while immature teratomas have a certain tendency to become malignant. When women do ultrasound examination found to have teratoma, it is best to give early surgical treatment, intraoperative send pathology test, in order to prevent the occurrence of malignant lesions of ovarian teratoma, but there is a certain tendency of recurrence after surgery, women do ovarian teratoma surgery, it is best to every 0.5 years or 1 year to review 1 time.