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TNM and Stage Groupings > Corpus Uteri Sarcoma
Corpus Uteri Sarcoma
Primary Tumor (T) - Leiomyosarcoma, Endometrial Stromal Sarcoma
| T Category |
Stage Category Definitions |
| TX |
Primary tumor cannot be assessed |
| T0 |
No evidence of primary tumor |
| T1 |
Tumor limited to the uterus |
| T1a |
Tumor 5 cm or less in greatest dimension |
| T1b |
Tumor more than 5 cm |
| T2 |
Tumor extends beyond the uterus, within the pelvis |
| T2a |
Tumor involves adnexa |
| T2b |
Tumor involves other pelvic tissues |
| T3* |
Tumor infiltrates abdominal tissues |
| T3a |
One site |
| T3b |
More than one site |
| T4 |
Tumor invades bladder or rectum |
* In this stage, lesions must infiltrate abdominal tissues and not just protrude into
the abdominal cavity.
Note: Simultaneous tumors of the uterine corpus and ovary/pelvis in association with
ovarian/pelvic endometriosis should be classified as independent primary
tumors.
Primary Tumor (T) - Adenosarcoma
| T Category |
Stage Category Definitions |
| TX |
Primary tumor cannot be assessed |
| T0 |
No evidence of primary tumor |
| T1 |
Tumor limited to the uterus |
| T1a |
Tumor limited to the endometrium/endocervix |
| T1b |
Tumor invades to less than half of the myometrium |
| T1c |
Tumor invades more than half of the myometrium |
| T2 |
Tumor extends beyond the uterus, within the pelvis |
| T2a |
Tumor involves adnexa |
| T2b |
Tumor involves other pelvic tissues |
| T3* |
Tumor involves abdominal tissues |
| T3a |
One site |
| T3b |
More than one site |
| T4 |
Tumor invades bladder or rectum |
* In this stage, lesions must infiltrate abdominal tissues and not just protrude into
the abdominal cavity.
Note: Simultaneous tumors of the uterine corpus and ovary/pelvis in association with
ovarian/pelvic endometriosis should be classified as independent primary
tumors.
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 (excluding adexa, pelvic, and abdominal tissue) |
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 |
| IIIA |
T3a |
N0 |
M0 |
| IIIB |
T3b |
N0 |
M0 |
| IIIC |
T1-3 |
N1 |
M0 |
| IVA |
T4 |
Any N |
M0 |
| IVB |
Any T |
Any N |
M1 |
*Note: Stages IA and IB differ from those applied for leiomyosarcoma
and endometrial stromal sarcoma.
**Note: Stage IC does not apply for leiomyosarcoma and endometrial
stromal sarcoma.
