Subcategorization of Lung Cancer Based on Tumor Size and Degree of Visceral Pleural Invasion⁎

Modified subcategorization of the pT2 category resulted in T2a (> 3 to ≤ 5 cm and P0-1) and T2b (> 5 cm or P2). Detailed assessment of the degree of visceral pleural invasion could provide more information on tumor characteristics and complement the pathologic staging of lung cancer.