Staging of lung cancer

• based on tumor size and extent of invasion (T),
• regional LN involvement [N: N0 (none), N1 (ipsilat. hilar), N2 (ipsilat. mediast.), N3 (contralat., supraclav.)] and
• presence of metastases (M) (Chest 2017;151:193).
• pleural effusions/implants = Stage IV.