FIGO Stage Classification for Ovarian Cancer

STAGE  1  - Tumour is confined to the ovary / ovaries

1A

• Only one ovary is affected by the tumour, the ovary capsule is intact
• No tumour is detected on the surface of the ovary
• Malignant cells are not detected in ascites or peritoneal washings

1B

• Both ovaries are affected by the tumour, the ovary capsule is intact
• No tumour is detected on the surface of the ovaries
• Malignant cells are not detected in ascites or peritoneal washings

1C

The tumour is limited to one or both ovaries, with any of the following:

• The ovary capsule is ruptured
• The tumour is detected on the ovary surface
• Positive malignant cells are detected in the ascites or peritoneal washings

STAGE 2 – Tumour involves one or both ovaries and has extended into the pelvis

2A

• The tumour has extended and/or implanted into the uterus and/or the fallopian tubes.
• Malignant cells are not detected in ascites or peritoneal washings

2B

• The tumour has extended to another organ in the pelvis
• Malignant cells are not detected in ascites or peritoneal washings

2C

• Tumours are as defined in 2A/B, and malignant cells are detected in the ascites or peritoneal washings

STAGE 3 – The tumour involves one or both ovaries with microscopically confirmed peritoneal metastasis outside the pelvis and/or regional lymph node metastasis.

Includes liver capsule metastasis.

3A

• Microscopic peritoneal metastasis beyond the pelvis

3B

• Microscopic peritoneal metastasis beyond the pelvis 2 cm or less in greatest dimension

3C

• Microscopic peritoneal metastasis beyond the pelvis more than 2 cm in greatest dimension and/or regional lymph nodes metastasis

STAGE: 4 – Distant metastasis beyond the peritoneal cavity. And, liver parenchymal metastasis.