TNM Classification for Malignant Pleural Mesothelioma
The tumor-node-metastasis (TNM) classification and prognostic groups for malignant pleural mesothelioma staging is provided below. [1, 2]
Table. TNM Classification for Malignant Pleural Mesothelioma (Open Table in a new window)
Primary tumor (T) |
|
TX |
Primary tumor cannot be assessed |
T0 |
No evidence of primary tumor |
T1 |
Tumor limited to the ipsilateral parietal pleura with or without mediastinal pleura and with or without involvement of visceral, mediastinal, or diaphragmatic pleura |
T2 |
Tumor involving each of the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least 1 of the following:
|
T3 |
Locally advanced but potentially resectable tumor; tumor involving all of the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least 1 of the following:
|
T4 |
Locally advanced, technically unresectable tumor; tumor involving all of the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least 1 of the following:
|
Regional lymph nodes (N) |
|
NX |
Regional lymph node(s) 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 metastases (M) |
|
M0 |
No distant metastasis |
M1 |
Distant metastasis |
Table. Anatomic stage/prognostic groups (Open Table in a new window)
Stage |
T |
N |
M |
IA |
T1 |
N0 |
M0 |
IB |
T2-T3 |
N0 |
M0 |
II |
T1-T2 |
N1 |
M0 |
IIIA |
T3 |
N1 |
M0 |
IIIB |
T1-T3 |
N2 |
M0 |
T4 |
Any N |
M0 |
|
IV |
Any T |
Any N |
M1 |