Incidental extravascular findings in computed tomographic angiography for planning or monitoring endovascular aortic aneurysm repair: Smoker patients, increased lung cancer prevalence?

Table 1 Recommendations for follow-up and management of single solid nodule[20]

Nodule size (mm)	Low risk patient1 (mm)	High risk patient2 (mm)
< 6	No routine FU	Optional CT at 12 mo
6-8	CT at 6-12 mo, then consider CT at 18-24 mo	CT at 6-12 mo, then CT at 18-24 mo
> 8	Consider CT, PET/CT, or tissue sampling at 3 mo	Consider CT, PET/CT, or tissue sampling at 3 mo

¹Minimal or absent history of smoking and of other known risk factors;

²A smoking history ≥ 30 p-y and quitting smoking within the past 15 years and/or the presence of other known risk factors. CT: Computed tomography; FU: Follow-up; PET: Positron emission tomography.