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TNM Stage.
| T1 | a. Encapsulated or unencapsulated with or without extension into mediastinal fat b. Extension into mediastinal pleura |
| T2 | Pericardium |
| T3 | Lung, InV, SVC, chest wall, phrenic nerve, hilar extrapericardial pulmonary vessels |
| T4 | Aorta, arch vessels, main pulmonary artery, myocardium, trachea, or esophagus |
InV, Innominate vein; SVC, Superior vena cava.
