FIGO staging of ovarian tumors Stage I:
Growth limited to the ovaries.
Ia - Growth limited to one ovary, no ascites containing malignant cells. No tumor on the external surface, capsule intact.
Ib - Growth limited to both ovaries, no ascites containing malignant cells. No tumor on the external surfaces, capsule intact.
Ic - Tumor either stage Ia or Ib but with tumor on the surface of one or both ovaries, or with capsule ruptured, or with ascites present containing malignant cells or with positive peritoneal washings.
Stage II:
Growth involving one or both ovaries with pelvic extension.
IIa - Extension and/or metastases to the uterus and/or fallopian tubes.
IIb - Extension to other pelvic tissues.
IIc - Tumor either stage IIa or IIb but with tumor on the surface of one or both ovaries or with capsule(s) ruptured or with ascites present containing malignant cells or with positive peritoneal washings.
Stage III:
Tumor involving one or both ovaries with peritoneal implants outside the pelvis and/or positive retroperitoneal or inguinal nodes. Superficial liver metastasis equals stage III. Tumor is limited to the true pelvis, but with histologically proven malignant extension to small bowel or omentum.
IIIa -Tumor grossly limited to the true pelvis with negative nodes but with histologically confirmed microscopic seeding of abdominal peritoneal surfaces.
IIIb -Tumor of one or both ovaries with histologically confirmed implants of abdominal peritoneal surfaces, none exceeding 2 cm in diameter. Nodes negative.
IIIc -Abdominal implants >2 cm in diameter or positive retroperitoneal or inguinal nodes or both.
Stage IV:
Growth involving one or both ovaries with distant metastasis. If pleural effusion is present, there must be positive cytologic test results to allot a case to stage IV. Parenchymal liver metastasis equals stage IV.
Growth limited to the ovaries.
Ia - Growth limited to one ovary, no ascites containing malignant cells. No tumor on the external surface, capsule intact.
Ib - Growth limited to both ovaries, no ascites containing malignant cells. No tumor on the external surfaces, capsule intact.
Ic - Tumor either stage Ia or Ib but with tumor on the surface of one or both ovaries, or with capsule ruptured, or with ascites present containing malignant cells or with positive peritoneal washings.
Stage II:
Growth involving one or both ovaries with pelvic extension.
IIa - Extension and/or metastases to the uterus and/or fallopian tubes.
IIb - Extension to other pelvic tissues.
IIc - Tumor either stage IIa or IIb but with tumor on the surface of one or both ovaries or with capsule(s) ruptured or with ascites present containing malignant cells or with positive peritoneal washings.
Stage III:
Tumor involving one or both ovaries with peritoneal implants outside the pelvis and/or positive retroperitoneal or inguinal nodes. Superficial liver metastasis equals stage III. Tumor is limited to the true pelvis, but with histologically proven malignant extension to small bowel or omentum.
IIIa -Tumor grossly limited to the true pelvis with negative nodes but with histologically confirmed microscopic seeding of abdominal peritoneal surfaces.
IIIb -Tumor of one or both ovaries with histologically confirmed implants of abdominal peritoneal surfaces, none exceeding 2 cm in diameter. Nodes negative.
IIIc -Abdominal implants >2 cm in diameter or positive retroperitoneal or inguinal nodes or both.
Stage IV:
Growth involving one or both ovaries with distant metastasis. If pleural effusion is present, there must be positive cytologic test results to allot a case to stage IV. Parenchymal liver metastasis equals stage IV.
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