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TNM and Stage Groupings > Cervix Uteri
Cervix Uteri
Primary Tumor (T)
| T Category |
Stage Category Definitions |
| TX |
Primary tumor cannot be assessed |
| T0 |
No evidence of primary tumor |
| Tis |
Carcinoma in situ (preinvasive carcinoma) |
| T1 |
Cervical carcinoma confined to uterus (extension to corpus should be disregarded) |
| T1a** |
Invasive carcinoma diagnosed only by microscopy. Stromal invasion with a
maximum depth of 5.0 mm measured from the base of the epithelium and a
horizontal spread of 7.0 mm or less. Vascular space involvement, venous or
lymphatic, does not affect classification |
| T1a1 |
Measured stromal invasion 3.0 mm or less in depth and 7.0 mm or less in
horizontal spread |
| T1a2 |
Measured stromal invasion more than 3.0 mm and not more than 5.0 mm with a
horizontal spread 7.0 mm or less |
| T1b |
Clinically visible lesion confined to the cervix or microscopic lesion greater than
T1a/IA2 |
| T1b1 |
Clinically visible lesion 4.0 cm or less in greatest dimension |
| T1b2 |
Clinically visible lesion more than 4.0 cm in greatest dimension |
| T2 |
Cervical carcinoma invades beyond uterus but not to pelvic wall or to lower third
of vagina |
| T2a |
Tumor without parametrial invasion |
| T2a1 |
Clinically visible lesion 4.0 cm or less in greatest dimension |
| T2a2 |
Clinically visible lesion more than 4.0 cm in greatest dimension |
| T2b |
Tumor with parametrial invasion |
| T3 |
Tumor extends to pelvic wall and/or involves lower third of vagina, and/or
causes hydronephrosis or non-functioning kidney |
| T3a |
Tumor involves lower third of vagina, no extension to pelvic wall |
| T3b |
Tumor extends to pelvic wall and/or causes hydronephrosis or non-functioning
kidney |
| T4 |
Tumor invades mucosa of bladder or rectum, and/or extends beyond true pelvis
(bullous edema is not sufficient to classify a tumor as T4) |
* FIGO staging no longer includes Stage 0 (Tis)
** All macroscopically visible lesions—even with superficial invasion—are
T1b/IB.
Regional Lymph Nodes (N)
| N Category |
Stage Category Definitions |
| NX |
Regional lymph nodes cannot be assessed |
| N0 |
No regional lymph node metastasis |
| N1 |
Reginal lymph node metastasis |
Distant Metastasis (M)
| M Category |
Stage Category Definitions |
| M1 |
Distant metastasis (including peritoneal spread, involvement of supraclavicular
or mediastinal lymph nodes, lung, liver, or bone) |
No distant metastasis (no pathologic M0; use clinical M to complete stage group)
Anatomic Stage/Prognostic Groups
| Stage |
T |
N |
M |
| 0* |
Tis |
N0 |
M0 |
| I |
T1 |
N0 |
M0 |
| IA |
T1a |
N0 |
M0 |
| IA1 |
T1a1 |
N0 |
M0 |
| IA2 |
T1a2 |
N0 |
M0 |
| IB |
T1b |
N0 |
M0 |
| IB1 |
T1b1 |
N0 |
M0 |
| IB2 |
T1b2 |
N0 |
M0 |
| II |
T2 |
N0 |
M0 |
| IIA |
T2a |
N0 |
M0 |
| IIA1 |
T2a1 |
N0 |
M0 |
| IIA2 |
T2a2 |
N0 |
M0 |
| IIB |
T2b |
N0 |
M0 |
| III |
T3 |
N0 |
M0 |
| IIIA |
T3a |
N0 |
M0 |
| IIIB |
T3b |
Any N |
M0 |
| IIIB |
T1-3 |
N1 |
M0 |
| IVA |
T4 |
Any N |
M0 |
| IVB |
Any T |
Any N |
M1 |
*FIGO no longer includes Stage 0 (Tis)
