Table 2.

Scoring system of the surface morphology for pure ground glass nodules ≥ 10 mm in diameter.

Score	Surface morphology	Peaks	Predicted behavior	First follow-up
1	Hilly	0	Benign	CT at 24 months
2	Hilly predominance	1	Probably benign	CT at 18 months
3	No predominance	2	Indeterminate	CT at 12 months
4	Mountainous predominance	3	Probably aggressive	CT at 9 months
5	Mountainous	4 or more	Aggressive	CT at 6 months

CT, computed tomography.