Final answer:
Ovarian cancer is definitively diagnosed through a biopsy accompanied by imaging and blood tests to look for tumor markers.
Step-by-step explanation:
To definitively diagnose ovarian cancer, a combination of methods are used. These diagnostic methods include medical imaging such as ultrasound, CT scans, and sometimes MRI to identify abnormalities. However, a definitive diagnosis can only be made through a biopsy of the ovarian tissue. This often involves a surgical procedure like laparoscopy, where a tiny camera is inserted into the abdomen to visually inspect the ovaries and surrounding areas for any abnormal growth or tumors. Additionally, blood tests may be performed to look for specific tumor markers associated with ovarian cancer.