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TNM and Stage Groupings > Ovary
Ovary
Primary Tumor (T)
| T Category |
Stage Category Definitions |
| TX |
Primary tumor cannot be assessed |
| T0 |
No evidence of primary tumor |
| T1 |
Tumor limited to ovaries (one or both) |
| T1a |
Tumor limited to one ovary; capsule intact, no tumor on ovarian surface. No
malignant cells in ascites or peritoneal washings |
| T1b |
Tumor limited to both ovaries; capsules intact, no tumor on ovarian surface. No
malignant cells in ascites or peritoneal washings |
| T1c |
Tumor limited to one or both ovaries with any of the following: capsule ruptured,
tumor on ovarian surface, malignant cells in ascites or peritoneal washings |
| T2 |
Tumor involves one or both ovaries with pelvic extension and/or implants |
| T2a |
Extension and/or implants on uterus and/or tube(s). No malignant cells in
ascites or peritoneal washings |
| T2b |
Extension to and/or implants on other pelvic tissues. No malignant cells in
ascites or peritoneal washings |
| T2c |
Pelvic extension and/or implants (T2a or T2b) with malignant cells in ascites or
peritoneal washings |
| T3 |
Tumor involves one or both ovaries with microscopically confirmed peritoneal
metastasis outside the pelvis |
| T3a |
Microscopic peritoneal metastasis beyond pelvis (no macroscopic tumor) |
| T3b |
Macroscopic peritoneal metastasis beyond pelvis 2 cm or less in greatest
dimension |
| T3c |
Peritoneal metastasis beyond pelvis more than 2 cm in greatest dimension
and/or regional lymph node metastasis |
Note: Liver capsule metastasis T3/Stage III; liver parenchymal metastasis M1/Stage IV.
Pleural effusion must have positive cytology for M1/Stage IV.
Regional Lymph Nodes (N)
| N Category |
Stage Category Definitions |
| NX |
Regional lymph nodes cannot be assessed |
| N0 |
No regional lymph node metastasis |
| N1 |
Regional lymph node metastasis |
Distant Metastasis (M)
| M Category |
Stage Category Definitions |
| M1 |
Distant metastasis (excludes peritoneal metastasis) |
No distant metastasis (no pathologic M0; use clinical M to complete stage group)
Anatomic Stage/Prognostic Groups
| Stage |
T |
N |
M |
| I |
T1 |
N0 |
M0 |
| IA |
T1a |
N0 |
M0 |
| IB |
T1b |
N0 |
M0 |
| IC |
T1c |
N0 |
M0 |
| II |
T2 |
N0 |
M0 |
| IIA |
T2a |
N0 |
M0 |
| IIB |
T2b |
N0 |
M0 |
| IIC |
T2c |
N0 |
M0 |
| III |
T3 |
N0 |
M0 |
| IIIA |
T3a |
N0 |
M0 |
| IIIB |
T3b |
N0 |
M0 |
| IIIC |
T3c |
N0 |
M0 |
| IIIC |
Any T |
N1 |
M0 |
| IV |
Any T |
Any N |
M1 |
