Fig. 2.

Examples of a stable GGN (left), progressive GGN (middle), and transformation of a GGN into a part-solid lesion over time (right). Panels are axial, coronal, and sagittal projections for upper, middle, and lower panels, respectively. (Left) Diameter/Volume 1 = 9.0 mm/382 mm³ Diameter/Volume 2 = 8.6 mm/338 mm³ Volume change (25.1 months) = −12 % (Middle) Diameter/Volume 1 = 5.3 mm/79 mm³ Diameter/Volume 2 = 11.1 mm/716 mm³ Volume change (36.8 months) = 803 % (Right) Diameter/Volume 1 = 13.5 mm/1281 mm³ Diameter/Volume 2 = 16.4 mm/2287 mm³; Solid component: 6.2 mm/122 mm³ Volume change (20.4 months) = 79 %