Version June 2024
| Primary tumor (T) | |||
| Leiomyosarcoma and endometrial stromal sarcoma | |||
| T category | FIGO stage | T criteria | |
| TX | Primary tumor cannot be assessed | ||
| T0 | No evidence of primary tumor | ||
| T1 | I | Tumor limited to the uterus | |
| T1a | IA | Tumor 5 cm or less in greatest dimension | |
| T1b | IB | Tumor more than 5 cm | |
| T2 | II | Tumor extends beyond the uterus, within the pelvis | |
| T2a | IIA | Tumor involves adnexa | |
| T2b | IIB | Tumor involves other pelvic tissues | |
| T3 | III | Tumor infiltrates abdominal tissues | |
| T3a | IIIA | One site | |
| T3b | IIIB | More than one site | |
| T4 | IVA | Tumor invades bladder or rectum | |
| Adenosarcoma | |||
| T category | FIGO stage | T criteria | |
| TX | Primary tumor cannot be assessed | ||
| T0 | No evidence of primary tumor | ||
| T1 | I | Tumor limited to the uterus | |
| T1a | IA | Tumor limited to the endometrium/endocervix | |
| T1b | IB | Tumor invades to less than half of the myometrium | |
| T1c | IC | Tumor invades one half or more of the myometrium | |
| T2 | II | Tumor extends beyond the uterus, within the pelvis | |
| T2a | IIA | Tumor involves adnexa | |
| T2b | IIB | Tumor involves other pelvic tissues | |
| T3 | III | Tumor infiltrates abdominal tissues | |
| T3a | IIIA | One site | |
| T3b | IIIB | More than one site | |
| T4 | IVA | Tumor invades bladder or rectum | |
| Regional lymph nodes (N) | |||
| All uterine sarcomas | |||
| 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 | IIIC | Regional lymph node metastasis | |
| Distant metastasis (M) | |||
| All uterine sarcomas | |||
| M category | FIGO stage | M criteria | |
| M0 | No distant metastasis | ||
| M1 | IVB | Distant metastasis (excluding adnexa, pelvic, and abdominal tissues) | |
| Prognostic stage groups | |||
| Leiomyosarcoma and endometrial stromal sarcoma | |||
| 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 |
| T2 | N0 | M0 | II |
| T3a | N0 | M0 | IIIA |
| T3b | N0 | M0 | IIIB |
| T1-3 | N1 | M0 | IIIC |
| T4 | Any N | M0 | IVA |
| Any T | Any N | M1 | IVB |
| Adenosarcoma | |||
| 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 |
| T3a | N0 | M0 | IIIA |
| T3b | N0 | M0 | IIIB |
| T1-3 | N1 | M0 | IIIC |
| T4 | Any N | M0 | IVA |
| Any T | Any N | M1 | IVB |
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