In gynecology, a teratoma refers to an ovarian teratoma. The surgical procedure for an ovarian teratoma is tumor excision. Therefore, immediate surgery is required once an ovarian teratoma is diagnosed. During an ultrasound, only the ovarian tumor can be seen, but its nature cannot be determined. Typically, a rapid pathological examination is needed during surgery. If the pathology results still indicate a mature teratoma, it is a benign tumor, and surgical removal is sufficient. Therefore, once discovered, surgical treatment is necessary because if the teratoma grows larger, it can damage the ovaries, potentially causing infertility or reduced ovarian function.