FIGO Staging for Ovarian Cancer (2014)

Stage I: Tumor confined to ovaries IA Tumor limited to 1 ovary, capsule intact, no tumor on surface, negative washings IB Tumor involves both ovaries otherwise like IA IC Tumor limited to 1 or both ovaries IC1 Surgical spill IC2 Capsule rupture before surgery or tumor on ovarian surface IC3 Malignant cells in the ascites or peritoneal washings Stage II: Tumor involves 1 or both ovaries with pelvic extension (below the pelvic brim) or primary peritoneal cancer IIA Extension and/or implant on uterus and/or fallopian tubes IIB Extension to other pelvic intraperitoneal tissues Stage III: Tumor involves 1 or both ovaries with cytologically or histologically confirmed spread to the peritoneum outside the pelvis and/or metastasis to the retroperitoneal lymph nodes IIIA Positive retroperitoneal lymph nodes and/or microscopic metastasis beyond the pelvis IIIA1 Positive retroperitoneal lymph nodes only IIIA1(i) Metastasis ≤10 mm IIIA1(ii) Metastasis >10 mm IIIA2 Microscopic, extrapelvic (above the brim) peritoneal involvement ± positive retroperitoneal lymph nodes IIIB Macroscopic, extrapelvic, peritoneal metastasis ≤2 cm ± positive retroperitoneal lymph nodes; includes extension to capsule of liver/spleen IIIC Macroscopic, extrapelvic, peritoneal metastasis >2 cm ± positive retroperitoneal lymph nodes; includes extension to capsule of liver/spleen Stage IV: Distant metastasis excluding peritoneal metastasis IVA Pleural effusion with positive cytology IVB Hepatic and/or splenic parenchymal metastasis, metastasis to extra-abdominal organs (including inguinal lymph nodes and lymph nodes outside of the abdominal cavity)