pathologic primary tumor stage for lung according to AJCC 7th edition pT3 (lung) A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is more than 7 cm or one that directly invades any of: parietal pleura, chest wall (including superior sulcus tumors), diaphragm, phrenic nerve, mediastinal pleura, parietal pericardiu or the tumor is in the main bronchus less than 2 cm distal to the carina but without involvement of the carina or there is associated atelectasis or obstructive pneumonitis of the entire lung or there is separate tumor nodule(s) in the same lobe as the primary.