Table 3.

FIGO classifications of ovarian cancer

FIGO stage	Subcategory and findings
I	A
	Tumor one ovary or fallopian tube
	B
	Both ovaries or fallopian tubes
	C
	One or both ovaries or fallopian tubes and
	C1: surgical spill
	C2: capsule ruptured or tumor on surface
	C3: malignant cells in ascites or peritoneal washings
II	A
	Extension/implants on uterus and/or ovaries and/or fallopian tubes
	B
	Extension to other pelvic intraperitoneal tissues
III	A
	A1 Positive retroperitoneal lymph nodes (LN) only
	A1(i): metastasis ≤10 mm
	A1(ii): metastasis >10 mm
	A2 Microscopic extrapelvic peritoneal spread ± LN
	B
	Peritoneal implants outside pelvis up to 2 cm ± retroperitoneal LN
	C
	Peritoneal implants outside pelvis > 2 cm ± retroperitoneal LN; liver and/or spleen surface metastasis included
IV	A
	Pleural effusion with positive cytology
	B
	Parenchymal metastasis, metastasis to extraperitoneal organs, inguinal LN and LN outside abdominal cavity

Changes made to the version from 1998 are highlighted