Teratomas in women are classified into benign and malignant categories. Benign teratomas typically have a complete capsule and grow very slowly. Some women find that the size of the teratoma does not change significantly during follow-up exams. Malignant teratomas, however, grow quickly and can present severe clinical symptoms, such as abdominal pain, bloating, and pelvic masses, with some women also experiencing fluid accumulation in the abdominal cavity. Furthermore, blood tests for gynecological tumor markers can also be used for differentiation. For example, in malignant tumors, markers such as CA-125, CA-199, and alpha-fetoprotein are elevated to varying degrees, particularly alpha-fetoprotein. During a CT scan, malignant teratomas may show unclear borders, potentially indicating invasion into the surrounding tissues. Additionally, after surgical removal of the tumor, pathological histological examination can be conducted for further differentiation. For instance, malignant teratomas tend to have a higher proportion of immature components.