Clinical symptoms and relevant examination can be combined to comprehensively determine whether ovarian cysts are cancerous or not. 1. Clinical symptoms: If patients with ovarian cysts have rapid growth of localized lumps, especially those with bilateral disease, the lumps can be touched in the abdomen, and it is obvious that the abdomen is enlarged, the possibility of malignant transformation should be considered. Some patients may also have lower abdominal discomfort, loss of appetite, abdominal distension, weight loss, loss of appetite, fatigue and other symptoms, which need to be alerted to the cancerous transformation of ovarian cysts. Clinical symptoms can be used to initially determine whether the ovarian cyst is cancerous or not. 2. Relevant examination: For patients who are suspected to have ovarian cysts with cancerous lesions, physical examination, ultrasound examination, abdominal and pelvic magnetic resonance imaging examination, tumor marker examination, cytological examination, pathological histological examination, etc. can be conducted under the guidance of doctors to help to diagnose whether cancerous lesions have occurred. Patients with ovarian cysts need to go to the hospital as soon as the symptoms of cancer are suspected, so as to clarify the cause of the disease. If the diagnosis is confirmed to be cancerous, they should actively cooperate with doctors to take relevant treatments so as to avoid delaying the condition.