Ovarian teratomas belong to the category of germ cell tumors, which are divided into mature teratomas and immature teratomas. Immature teratomas are malignant and account for 1%-3% of ovarian teratomas, thus they occur relatively less frequently. These are more commonly found in young patients, with an average age of 11-19 years. Mature teratomas, also known as dermoid cysts, are benign and can account for 10%-20% of ovarian tumors and 85%-97% of germ cell tumors, comprising over 95% of ovarian teratomas. These can occur at any age, but are most common between 20-40 years, often unilateral, and may contain components such as fats, hair, and sometimes teeth and bone tissues. Thus, the majority of mature teratomas are benign tumors.