Fig. 5
High risk group patients of Case 1 (1a, 1b, 1c) and Case 2 (2a, 2b, 2c): Case 1 was the solid nodule with the lobulated sign (straight arrow in 1a) and vascular/cord shadows (fine arrow in 1b), with no-spherical growth in coronal plane and the growth angle of 135 °(curved arrow in 1c). Case 2 was sub-solid nodule with no-spherical growth in cross section, with the irregular shape, bronchial shadow (arrow head in 2a), vascular/cord shadows (fine arrow in Fig. 2b) and pleural indentation sign (star in 2c)