Primary tumor (T) | |||
T category | T criteria | ||
TX | Primary tumor cannot be assessed | ||
T0 | No evidence of primary tumor | ||
T1 | Tumor limited to the ipsilateral parietal pleura with or without involvement of:
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T2 | Tumor involving each of the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least one of the following features:
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T3 | Describes locally advanced but potentially resectable tumor. Tumor involving all the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least one of the following features:
| ||
T4 | Describes locally advanced technically unresectable tumor. Tumor involving all the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least one of the following features:
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Regional lymph nodes (N) | |||
N category | N criteria | ||
NX | Regional lymph nodes cannot be assessed | ||
N0 | No regional lymph node metastases | ||
N1 | Metastases in the ipsilateral bronchopulmonary, hilar, or mediastinal (including the internal mammary, peridiaphragmatic, pericardial fat pad, or intercostal) lymph nodes | ||
N2 | Metastases in the contralateral mediastinal, ipsilateral, or contralateral supraclavicular lymph nodes | ||
Distant metastasis (M) | |||
M category | M criteria | ||
M0 | No distant metastasis | ||
M1 | Distant metastasis present | ||
Prognostic stage groups | |||
When T is... | And N is... | And M is... | Then the stage group is... |
T1 | N0 | M0 | IA |
T2 or T3 | N0 | M0 | IB |
T1 | N1 | M0 | II |
T2 | N1 | M0 | II |
T3 | N1 | M0 | IIIA |
T1-3 | N2 | M0 | IIIB |
T4 | Any N | M0 | IIIB |
Any T | Any N | M1 | IV |
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