Table 2 Diagnostic criteria for primary peritoneal cancer (GOG)
From: Breast metastasis from pelvic high-grade serous adenocarcinoma: a report of two cases
1. Bilateral ovaries are normal size or swollen because of benign changes |
2. Extraovarian lesions are larger than those on the surface of the ovary |
3. Microscopically, the ovarian lesions meet one of the following: |
  No lesion in ovary |
  Lesion was confined to the superficial epithelium of the ovary without invasion of the stroma |
  Lesions within the ovarian surface epithelium and stroma, but within 5 × 5 mm |
  The lesion within the parenchyma of the ovary is within 5 × 5 mm regardless of the presence or absence of lesions on the surface of the ovary |
4. The histological and cytological features of the tumor are similar or identical to serous adenocarcinoma of the ovary |