Pelvic nodules are not necessarily cancerous. In addition to primary or metastatic malignant tumors in the pelvis, pelvic nodules may also be benign nodules, such as subplasma myoma, broad ligament myoma, ovarian fibroma, endometriosis nodules in the pelvis, and peritoneal spread smooth muscle tumors in the pelvis. If abnormal masses in pelvic cavity are detected by ultrasound examination, it is necessary to combine with other examinations or other symptoms to help determine their nature, such as recent diet, abnormal abdominal sensation such as cramping, fatigue, blood tests for anemia and abnormal elevation of tumor markers, etc. If necessary, magnetic resonance imaging of pelvic and abdominal cavity can also be used. If necessary, the results of pelvic and abdominal magnetic resonance imaging can also be used, and if necessary, hospitalization and surgery will be required to make the final diagnosis.