Teratoma must be treated surgically because teratoma is clinically divided into mature teratoma and immature teratoma, and immature teratoma, in clinical terms, is a malignant tumor. Therefore, once a teratoma is detected, it must be treated surgically as soon as possible. Although mature teratomas are benign tumors, there are still 2%-4% that can become malignant in clinical practice, especially in postmenopausal women. Once a teratoma is detected, it often has the potential to become malignant. Therefore, once a teratoma is found, it should be treated by surgery as soon as possible, and after the teratoma is found, it is recommended to have three blood tests for gynecological tumors, mainly to rule out the possibility of malignancy.