label: Stage IV Lung Cancer AJCC v7
label_lc: stage iv lung cancer ajcc v7
description: Stage IV includes: (Any T, Any N, M1a); (Any T, Any N, M1b).  M1a: Lung cancer with separate tumor nodule(s) in a contralateral lobe; tumor with pleural nodules or malignant pleural (or pericardial) effusion.  M1b: Distant metastasis. (AJCC 7th ed.)