The ovaries of women are located at the bottom of the pelvic cavity. Benign tumors are not easily detectable when they are small in diameter, and generally do not show symptoms of pressure until they have grown to a large size, including frequent urination, constipation and abdominal enlargement. Malignant tumors are also asymptomatic when the lesion is small, but because of their rapid growth rate, they are prone to spread and cause extensive abdominal implantation and ascites, and distant metastases can occur, so when clinical symptoms appear for examination, they are usually advanced. Gynecological examination will reveal ascites and pelvic masses, ultrasound, CT and MRI will reveal cystic solid masses in pelvis and elevated tumor markers. The early manifestations of ovarian cancer are not specific and mainly include loss of appetite, lower abdominal cramping and change in bowel habits. Late stage manifests as nausea and anorexia, abdominal pain and distension, frequent urination and abdominal enlargement. If the tumor compresses the intestinal canal, intestinal obstruction will occur, manifesting as nausea and vomiting. If the tumor metastasizes to the lungs, pleural effusion will appear, manifesting as shortness of breath and difficulty in breathing. Individual women found ovarian cancer because of swollen lymph nodes in the groin or neck. Some women are even diagnosed with ovarian cancer due to refractory dermatomyositis. Ovarian cancer has various manifestations and is not easy to be detected in early stage, therefore, regular gynecological examination is crucial for early detection and treatment of the disease.