Ovarian teratomas, if detected by ultrasound, are indicative of surgery regardless of the size of the tumor. However, it is essential to locate the lesion accurately to proceed with the surgery. For teratomas smaller than two centimeters, it can be quite challenging to find the lesion, which might lead to surgical failure. Additionally, this can increase the trauma for the patient and the costs of surgery. Thus, it is generally advised to perform surgery on teratomas that are larger than two centimeters to ensure a more reliable outcome. In cases where patients have other diseases in conjunction with a teratoma, it is also feasible to consider removing the teratoma during surgery for the other conditions, always attempting to thoroughly explore and locate the teratoma regardless of its size.