Figure 2.

GGNs with pleural indentation or pleura attachment and their corresponding pathologic manifestations. (A,B) A part-solid GGN with pleural indentation (arrow) showed typical VPI. The tumor was an invasive adenocarcinoma with lepidic predominant (elastic, 100×); (C,D) although radiologically similar to the above case, there was no tumor invasion into the visceral pleura despite being histologically lepidic predominant invasive adenocarcinoma and a radiologically part-solid GGN with pleural indentation (arrow) (elastic, 40×); (E,F) a pure GGN with simply pleural attachment (arrow) was also lepidic predominant invasive adenocarcinoma with prominent VPI (elastic, 100×).