When dealing with ovarian teratomas, whether surgery is required depends on the nature and size of the teratoma and the clinical symptoms of the patient. Not all teratomas necessarily require surgical treatment. Ovarian teratomas are germ cell tumors that occur in the ovaries. They can be classified into benign and malignant teratomas. Benign teratomas are well differentiated, and the tumor body may contain tissues such as hair and teeth. Generally, smaller teratomas can be observed periodically, but if the teratoma is larger and causes a pelvic mass lesion, surgical treatment is necessary. Malignant teratomas definitely require surgical excision and treatment.