Correlation between pleural tags on CT and visceral pleural invasion of peripheral lung cancer that does not appear touching the pleural surface

To evaluate the association between a sign and visceral pleural invasion (VPI) of peripheral non–small-cell lung cancer (NSCLC) that does not appear touching the pleural surface. A total of 221 consecutive patients with NSCLC that did not appear touching the pleural surface, ≤ 3 cm in solid tumor diameter, and was surgically resected between January 2009 and December 2015 were included. We focused on the flat distortion of the tumor caused by an...