Figure 6.

STAS in a 45-year-old man with micropapillary predominant subtype of invasive adenocarcinoma (A). Multiplanar reconstructed CT image (width, 1,500 HU; level, −600 HU) shows a ground glass-density spiculation extending into the adjacent lungs (arrow), and several ground glass-density satellite foci with a diameter of 1–2 mm were observed at the edge of the lesion (white triangle) (B). Photomicrograph shows multiple solid nests clusters alveolar disseminations at the edge of one side of the lesion (arrow), spreading through the interlobular fissure (black triangle) to the alveolar cavities of the adjacent pulmonary lobe (C). Volume render reconstructed image shows visceral pleural indentation (D). Photomicrograph shows visceral pleural invasion, indentation, and thickening.