CA724, the normal value ranges between 0-7. It is a tumor marker for women with ovarian cancer. Generally tumor marker is considered abnormal if it is five to ten times higher than the upper limit of normal value. Therefore, when ovarian lesions are suspected to occur, it is important to combine gynecologic ultrasound, tumor markers and clinical symptoms for comprehensive management. Because the ovaries are located in the deep part of the pelvic cavity, if ovarian lesions occur, they are usually not detected at an early stage, and when ovarian lesions are detected, most of them are in the middle or late stage of ovarian cancer.