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Understand Ovarian Cancer Staging - FIGO Classification

Staging helps to determine the disease prognosis, and to select an appropriate treatment strategy.

FIGO (International Federation of Gynecology and Obstetrics) is the most commonly used staging systems for ovarian cancer.

Following table describe the characteristics of ovarian cancer according to different stages:

Ovary Cancer - Stage I and II - Infographic
Ovary Cancer - Stage I and II
Ovary Cancer - Stage III and IV - Infographic
Ovary Cancer - Stage III and IV
FIGO STAGE DESCRIPTION
I The cancer cells are present only in the ovary (or ovaries) or fallopian tube(s).
IA Tumor limited to one ovary/fallopian tube, with capsule intact, with no disease on ovary/fallopian tube surface.
No cancer cells detected in ascites or peritoneal washings.
IB Tumor limited to both ovaries/fallopian tubes, with capsule intact, with no disease on ovary/fallopian tube surface.
No cancer cells detected in ascites or peritoneal washings.
IC1 The cancer cells leak into the abdomen/pelvis during surgery (surgical spill)
IC2 Tumor present on the capsule of the ovary/fallopian tube or the capsule ruptured before surgery
IC3 The cancer cells are detected in ascites or peritoneal washings
II Tumor involves one or both ovaries/fallopian tubes with invasion into a pelvic organ (uterus, bladder, sigmoid colon, or rectum) or primary peritoneal cancer.
IIA Tumor extension/implants from ovaries/fallopian tubes to uterus.
IIB Tumor extension/implants from ovaries/fallopian tubes to bladder, sigmoid colon, rectum, or other pelvic tissues.
IIIA1 Tumor involves one or both ovaries/fallopian tubes or primary peritoneal cancer with spread to retroperitoneal lymph nodes only.
IIIA2 Tumor involves one or both ovaries/fallopian tubes with microscopic peritoneal deposits with/without spread to retroperitoneal lymph nodes.
IIIB Tumor involves one or both ovaries/fallopian tubes with macroscopic peritoneal deposits (</=2 cm) with/without spread to retroperitoneal lymph nodes.
IIIC Tumor involves one or both ovaries/fallopian tubes with macroscopic peritoneal deposits (>2 cm) with/without spread to retroperitoneal lymph nodes. The cancer cells might have invaded the capsule of the liver or the spleen without parenchymal involvement.
IVA Tumor spread to the fluid in pleural cavity (pleural effusion) with positive cytology.
IVB Tumor spread to the spleen/liver parenchyma, to the lymph nodes other than the retroperitoneal lymph nodes, and/or to other organs outside the abdomen such as the lungs, bones, etc.
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