Stage IIA Lung Cancer AJCC v9

**Semantic type:** Neoplastic Process

**Definition:** Stage IIA includes: (T2b, N0, M0); (T1, N1, M0). T2b: Tumor measuring more than 4 cm but 5 cm or less in greatest dimension with or without any of the following features: invasion of visceral pleura; invasion of an adjacent lobe; involvement of main bronchus (up to but not including the carina) or is associated with atelectasis or obstructive pneumonitis, extending to the hilar regions, involving either part of or the entire lung. T1: Tumor measuring 3 cm or less in greatest dimension surrounded by lung or visceral pleura, or in a lobar or more peripheral bronchus. N0: No tumor involvement of regional lymph node(s). N1: Tumor involvement of ipsilateral peribronchial and/or ipsilateral hilar and/or ipsilateral intrapulmonary lymph node station(s), including involvement by direct extension. M0: No distant metastasis. (AJCC 9th ed.)