TABLE.

FIGO Staging for Carcinoma of the Ovary¹⁰

Stage I		Growth limited to the ovaries.
	IA	Growth limited to 1 ovary, no ascites present containing malignant cells. No tumor on the external surface; capsule intact.
	IB	Growth limited to both ovaries, no ascites present containing malignant cells. No tumor on the external surface; capsule intact.
	IC	Tumor classified as either stage IA or IB but with tumor on the surface of 1 or both ovaries; or with ruptured capsule(s); or with ascites containing malignant cells or with positive peritoneal washings.
Stage II		Growth involving 1 or both ovaries, with pelvic extension.
	IIA	Extension and/or metastases to the uterus and/or tubes.
	IIB	Extension to other pelvic tissues.
	IIC	Tumor either stage IIA or IIB but with tumor on the surface of 1 or both ovaries; or with capsule(s) ruptured; or with ascites containing malignant cells or with positive peritoneal washings.
Stage III		Tumor involving 1 or both ovaries with peritoneal implants outside the pelvis and/or positive retroperitoneal or inguinal nodes. 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 the abdominal peritoneal surfaces.
	IIIB	Tumor of 1 or both ovaries with histologically confirmed implants of abdominal peritoneal surfaces, none exceeding 2 cm in diameter; nodes are negative.
	IIIC	Abdominal implants greater than 2 cm in diameter and/or positive retroperitoneal or inguinal nodes.
Stage IV		Growth involving 1 or both ovaries, with distant metastases. If pleural effusion is present, there must be positive cytology findings to allot a case to stage IV. Parenchymal liver metastasis equals stage IV.

Abbreviation: FIGO, International Federation of Gynecology and Obstetrics.