Fig. 2
56-year-old female with invasive adenocarcinoma in the left upper lobe, STAS (−). On axial CT in the lung window (a) and axial chest thin-slice CT (d), a pure ground-glass lesion which is about 1.5 × 2.0 cm can be observed, lobulation sign and vessel convergence can be seen. Axial PET (b) and axial fused PET/CT (c) show the SUVmax of the lesion is 1.4 g/ml. Photomicrograph (hematoxylin-eosin stain, magnification × 400) (e) shows no tumor tissue in the alveolar cavity outside the edge (dashed line) of the tumor (triangle)