Ultrasound or CT scans detecting ovarian masses, in combination with biopsy or cytological examination that identify cancer cells, can diagnose ovarian cancer. A common method of biopsy includes ultrasound-guided procedures or transvaginal cul-de-sac puncture biopsy of ovarian masses, enabling clear pathological confirmation. Additionally, exploratory laparotomy or early radical surgery for ovarian cancer patients can yield a postoperative pathological diagnosis of ovarian cancer. Moreover, the presence of ascites is a common symptom in ovarian cancer patients; finding cancer cells, especially adenocarcinoma, in ascites, coupled with significantly elevated tumor marker CA125, or ultrasound or CT imagery revealing ovarian masses, can also diagnose ovarian cancer.