Ovarian cancer staging is determined surgically, unless it is stage 4 (metastasis outside of the abdomen, or metastasis to the liver -- not on the surface of the liver). If it is stage 4, or very advanced stage 3, then often this is proven with biopsy, and chemotherapy is begun neoadjuvantly (before surgery). If the disease is not obviously stage 4, then aggressive surgical staging and debulking (see next section) often is considered. This decision is based on the health of the patient, as well as the judgment of the surgeon as to the chance of achieving an optimal debulking (see treatment below).
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