Tab. III.

Recommendations of the Fleischner Society for management of non-solid lung tumors [12]

Solitary non-solid tumor
< 5 mm	Surveillance not required
> 5 mm	LDCT follow-up at 3 months. If the tumor persists, yearly surveillance for at least 3 years is recommended.
Solitary part-solid lung tumor	LDCT follow-up at 3 months. If the tumor persists, and the solid component's diameter does not exceed 5 mm, yearly surveillance for at least 3 years is recommended. If the solid component's diameter exceeds 5 mm, biopsy or surgical excision is recommended.
Numerous non-solid lesions up to 5 mm	CT follow-up after 2 and 4 years is recommended.
Non-solid lesions > 5 mm without a dominant lesion	LDCT follow-up at 3 months. If the tumor persists, yearly surveillance for at least 3 years is recommended.
The dominant nodule has a solid or part-solid component	LDCT follow-up at 3 months. If the tumor persists, biopsy or surgical excision is recommended, especially if the solid component exceeds 5 mm.

LDCT – low-dose computed tomography, CT – computed tomography