OVARIAN AND PRIMARY PERITONEAL CANCER STAGING

• Stage I - limited to one or both ovaries
  • IA - involves one ovary; capsule intact; no tumor on ovarian surface; no malignant cells in ascites or peritoneal washings
  • IB - involves both ovaries; capsule intact; no tumor on ovarian surface; negative washings
  • IC - tumor limited to ovaries with any of the following: capsule ruptured, tumor on ovarian surface, positive washings
• Stage II - pelvic extension or implants
  • IIA - extension or implants onto uterus or fallopian tube; negative washings
  • IIB - extension or implants onto other pelvic structures; negative washings
  • IIC - pelvic extension or implants with positive peritoneal washings
• Stage III - microscopic peritoneal implants outside of the pelvis; or limited to the pelvis with extension to the small bowel or omentum
  • IIIA - microscopic peritoneal metastases beyond pelvis
  • IIIB - macroscopic peritoneal metastases beyond pelvis less than 2 cm in size
  • IIIC - peritoneal metastases beyond pelvis > 2 cm or lymph node metastases (retroperitoneal or inguinal)
• Stage IV - distant metastases to the liver or outside the peritoneal cavity
• Note: Liver capsule metastasis T3/Stage III; liver parenchymal metastasis M1/Stage IV.
  Pleural effusion must have positive cytology for M1/Stage IV.