Teratoma with a length or width of 16cm is a relatively large tumor, which can compress the surrounding tissues and is prone to rupture, so it is relatively serious. In addition, there are benign and malignant teratomas, and the prognosis of benign teratomas is better than that of malignant teratomas. Symptoms of teratomas are also different for different types of teratomas. When a teratoma ruptures, there will be acute abdominal pain, as well as nausea and vomiting. Most teratomas are benign tumors and have a good prognosis after surgical removal. For patients with reproductive needs, normal ovarian tissue should be preserved as much as possible. Malignant teratomas require chemotherapy, and immature teratomas of the ovary are more likely to recur and metastasize. Symptoms vary depending on the type of teratoma. For example, ovarian teratomas have symptoms of abdominal pain, irregular menstruation, and abdominal masses. Sacrococcygeal teratoma can cause constipation due to compression of the rectum. The symptoms of malignant teratoma are more serious, and the patient will lose weight significantly and suffer from severe anemia. To sum up, once the patients find teratoma, it is recommended to consult the doctor in time and treat it actively under the doctor’s guidance.