Task: Instance Description Understanding (ontology: Sciences/Computer_Science)

Which of the following definitions best describes the instance 'pT2 (lung)'?

A. A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is 3 cm or less 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).
B. 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.
C. A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is 2 cm or less in greatest dimension.
D. A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is more than 3 cm but not more than 7 cm or the tumor has any of the following features: involves main bronchus, 2 cm or more distal to the carina, invades visceral pleura, associated with atelectasis or obstructive pneumonitis that extends to the hilar region but does not involve the entire lung.

Answer: A pathologic primary tumor stage for lung according to AJCC 7th edition indicating that the tumor is more than 3 cm but not more than 7 cm or the tumor has any of the following features: involves main bronchus, 2 cm or more distal to the carina, invades visceral pleura, associated with atelectasis or obstructive pneumonitis that extends to the hilar region but does not involve the entire lung.