


Tumors are larger than 5 cm but not larger than 7 cmĪND have grown into the lung’s outer lining (parietal pleura) or nearby sites including chest wall, phrenic nerve OR have grown into the lining of the heart (pericardium) OR primary and secondary tumors are in the same lobe.ĪND have grown into the diaphragm, mediastinum, heart or its major blood vessels, windpipe (trachea), recurrent laryngeal nerve, carina, esophagus, or spine OR there are secondary tumors in the same lung but in a different lobe than the primary tumor.The respiratory system consists of a conducting zone ( anatomic dead space i.e., the airways of the mouth, nose, pharynx, larynx, trachea, bronchi, bronchioles, and terminal bronchioles) and a respiratory zone ( lung parenchyma i.e., respiratory bronchioles, alveolar ducts, alveolar sacs). Other features may or may not be present.

Other features may or may not be present but smaller tumors with other features are also rated T2a. Tumors are larger than 3 cm but smaller than 5 cmĪND have grown into the main bronchus (the two airway tubes that split off of the windpipe) OR have grown into the lung’s inner lining (visceral pleura) OR have caused lung collapse (atelectasis) or swelling (pneumonitis). Tumors are larger than 2 cm but smaller than 3 cm and are at least 0.5 cm deep into the tissue. Tumors are larger than 1 cm but smaller than 2 cm and are at least 0.5 cm deep into the tissue of the lung. Tumors are 1 cm or smaller and are at least 0.5 cm or deeper into the tissue of the lung. Tumors grow only along the surface of lung tissue and are not 0.5 cm deep into the tissue of the lung. Tumors are only in the lungs and are 3 cm or smaller. There are abnormal or cancer cells in airways that have not spread to other lung tissue. Tumors are too small for testing or cannot be found with tests.
