Table 2.

2017 Fleischner Society management protocol for single solid indeterminate pulmonary nodules ≤ 250 mm³.

Nodule volume	Patient risk status
	Low risk	High risk
< 100 mm3	No routine follow-up	Optional CT at 12 months∗
100-250 mm3	Initial CT at 6-12 month, then consider CT at 18-24 months	Initial CT at 6-12 month, then CT at 18-24 months

∗ High-risk patients with nodules < 100 mm³ with a suspicious morphology and/or an upper lobe location should repeat CT at 12 months.