Stages of Ovarian Cancer

Stage 1: Tumor limited to the ovaries

IA , limited to one ovary, no tumor on the ovarian surface, no malignant cells in ascites or peritoneal washings, capsule intact

IB , limited to both ovaries, no tumor on the ovarian surface, no malignant cells in ascites or peritoneal washings, capsules intact

IC , limited to one or both ovaries, tumor on ovarian surface, capsule ruptured, ascites or peritoneal washings containing malignant cells

Stage 2: Tumor involving one or both ovaries with pelvic extension

IIA , extension or metastasis to the uterus or tubes, no malignant cells in ascites or peritoneal washings

IIB , extension to other pelvic tissues, no malignant cells in ascites or peritoneal washings

IIC , pelvic extension, ascites fluid or peritoneal washings containing malignant cells

Stage 3: Tumor involving one or both ovaries, peritoneal implants outside the pelvis or regional lymph node metastasis

IIIA , gross tumor limited to the true pelvis, negative nodes, microscopic peritoneal metastasis beyond the pelvis

IIIB , macroscopic peritoneal metastasis 2 cm or less in greatest dimension beyond the pelvis

IIIC , abdominal implants greater than 2 cm in greatest dimension or positive regional nodes

Stage 4: Tumor involving one or both ovaries, metastasis greater than 2 cm in greatest dimension beyond the pelvis. If pleural effusion is present, cytologic test results must be positive.

Parenchymal liver metastases equals stage 5.