Patients with ovarian cancer may have relatively hidden clinical symptoms in the early stages, possibly without any specific discomfort, or just mild lower abdominal bloating or pain. Symptoms tend to become more apparent only when the tumor progressively enlarges or when ascites occur, such as increased abdominal bloating and pain. Furthermore, during a physical examination, a solid or cystic-solid mass can be palpated in the pelvic area. Ascites can also lead to clinical symptoms such as nausea and vomiting. In the late stages, partial intestinal obstruction or symptoms related to pelvic compression may appear.