Primary tumor (T) |
T category | FIGO stage | T criteria |
TX | | Primary tumor cannot be assessed |
T0 | | No evidence of primary tumor |
T1 | I | Tumor limited to ovaries (one or both) or fallopian tube(s) |
T1a | IA | Tumor limited to one ovary (capsule intact) or fallopian tube, no tumor on ovarian or fallopian tube surface; no malignant cells in ascites or peritoneal washings |
T1b | IB | Tumor limited to both ovaries (capsules intact) or fallopian tubes; no tumor on ovarian or fallopian tube surface; no malignant cells in ascites or peritoneal washings |
T1c | IC | Tumor limited to one or both ovaries or fallopian tubes, with any of the following: |
T1c1 | IC1 | |
T1c2 | IC2 | - Capsule ruptured before surgery or tumor on ovarian or fallopian tube surface
|
T1c3 | IC3 | - Malignant cells in ascites or peritoneal washings
|
T2 | II | Tumor involves one or both ovaries or fallopian tubes with pelvic extension below pelvic brim or primary peritoneal cancer |
T2a | IIA | Extension and/or implants on the uterus and/or fallopian tube(s) and/or ovaries |
T2b | IIB | Extension to and/or implants on other pelvic tissues |
T3 | III | Tumor involves one or both ovaries or fallopian tubes, or primary peritoneal cancer, with microscopically confirmed peritoneal metastasis outside the pelvis and/or metastasis to the retroperitoneal (pelvic and/or para-aortic) lymph nodes |
T3a | IIIA2 | Microscopic extrapelvic (above the pelvic brim) peritoneal involvement with or without positive retroperitoneal lymph nodes |
T3b | IIIB | Macroscopic peritoneal metastasis beyond pelvis 2 cm or less in greatest dimension with or without metastasis to the retroperitoneal lymph nodes |
T3c | IIIC | Macroscopic peritoneal metastasis beyond the pelvis more than 2 cm in greatest dimension with or without metastasis to the retroperitoneal lymph nodes (includes extension of tumor to capsule of liver and spleen without parenchymal involvement of either organ) |
Regional lymph nodes (N) |
N category | FIGO stage | N criteria |
NX | | Regional lymph nodes cannot be assessed |
N0 | | No regional lymph node metastasis |
N0(i+) | | Isolated tumor cells in regional lymph node(s) no greater than 0.2 mm |
N1 | IIIA1 | Positive retroperitoneal lymph nodes only (histologically confirmed) |
N1a | IIIA1i | Metastasis up to and including 10 mm in greatest dimension |
N1b | IIIA1ii | Metastasis more than 10 mm in greatest dimension |
Distant metastasis (M) |
M category | FIGO stage | M criteria |
M0 | | No distant metastasis |
M1 | IV | Distant metastasis, including pleural effusion with positive cytology; liver or splenic parenchymal metastasis; metastasis to extra-abdominal organs (including inguinal lymph nodes and lymph nodes outside the abdominal cavity); and transmural involvement of intestine |
M1a | IVA | Pleural effusion with positive cytology |
M1b | IVB | Liver or splenic parenchymal metastases; metastases to extra-abdominal organs (including inguinal lymph nodes and lymph nodes outside the abdominal cavity); transmural involvement of intestine |
Prognostic stage groups |
When T is... | And N is... | And M is... | Then the stage group is... |
T1 | N0 | M0 | I |
T1a | N0 | M0 | IA |
T1b | N0 | M0 | IB |
T1c | N0 | M0 | IC |
T2 | N0 | M0 | II |
T2a | N0 | M0 | IIA |
T2b | N0 | M0 | IIB |
T1/T2 | N1 | M0 | IIIA1 |
T3a | NX, N0, N1 | M0 | IIIA2 |
T3b | NX, N0, N1 | M0 | IIIB |
T3c | NX, N0, N1 | M0 | IIIC |
Any T | Any N | M1 | IV |
Any T | Any N | M1a | IVA |
Any T | Any N | M1b | IVB |