Ovarian teratomas are a type of germ cell tumor, requiring surgical treatment whether the teratoma is benign or malignant. Teratomas can be divided into mature teratomas and immature teratomas. Mature teratomas, also known as dermoid cysts, are considered benign tumors. Immature teratomas are malignant tumors, accounting for 1%-3% of ovarian teratomas. Mature teratomas are cystic with a single chamber filled with sebum and hair, and sometimes teeth and bone material can be found inside. Therefore, once a teratoma is identified, the choice of surgical method depends on the size of the tumor, and some biochemical tests are needed to determine the nature of the cystic tumor.