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No Evidence Of Primary Tumor (T0)
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Tumor <=3 Cm In Greatest Dimension, Surrounded By Lung Or Visceral Pleura, Without Bronchoscopic Evidence Of Invasion More Proximal Than The Lobar Bronchus (i.e., Not In The Main Bronchus) (T1)
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Tumor <=2 Cm In Greatest Dimension (T1a)
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Tumor > 2 Cm But <=3 Cm In Greatest Dimension (T1b)
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Tumor > 3 Cm But <=7 Cm Involves Main Bronchus, >=2 Cm Distal To The Carina Invades Visceral Pleura (pl1 Or Pl2) Associated With Atelectasis Or Obstructive Pneumonitis That Extends To The Hilar Region But Does Not Involve The Entire Lung (T2)
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Tumor > 3 Cm But <=5 Cm In Greatest Dimension (T2a)
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Tumor > 5 Cm But <=7 Cm In Greatest Dimension (T2b)
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Tumor > 7 Cm Or One That Directly Invades Any Of The Following: Parietal Pleural (pl3) Chest Wall (including Superior Sulcus Tumors), Diaphragm, Phrenic Nerve, Mediastinal Pleura, Parietal Pericardium; Or Tumor In The Main Bronchus (T3)
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Tumor Of Any Size That Invades Any Of The Following: Mediastinum, Heart, Great Vessels, Trachea, Recurrent Laryngeal Nerve, Esophagus, Vertebral Body, Carina, Separate Tumor Nodule(s) In A Different Ipsilateral Lobe (T4)
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Tis Carcinoma In Situ (Tis)
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Primary Tumor Cannot Be Assessed (TX)