Ovarian tumors are distinguished from the following diseases: 1. broad ligament leiomyosarcoma, if there is leiomyosarcoma in the broad ligament, it is difficult to distinguish it from ovarian tumor, it is recommended to do ultrasound examination to differentiate accordingly, and if the ovary is a malignant tumor, through the three laboratory tests of gynecological tumor, it will often show elevated carcinoembryonic antigen or carcinoma antigen, while broad ligament leiomyosarcoma is usually benign and will not show abnormalities of the three gynecological tumors. 2. The most important thing is to differentiate between tubal cysts, which are also known as tubal effusion, and ovarian tumors, which can cause recurrent lower abdominal pain and have a history of pelvic inflammatory disease, while ovarian tumors often do not cause lower abdominal pain. 3, to differentiate between tubal pregnancy and ovarian pregnancy, if the pregnancy is localized in the ovary, it can be differentiated by medical history and HCG laboratory tests.