“ The purpose of the guidelines is to help with the management of small lung nodules detected incidentally. The likelihood of malignancy dep...
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The purpose of the guidelines is to help with the management of small lung nodules detected incidentally. The likelihood of malignancy depends on nodule size and patient factors.
• A low-risk patient has minimal/no smoking history and no other known risk factors (e.g. significant family history, asbestos exposure, etc.).
• The likelihood of malignancy is thought to be 0.2% for nodules of <3 mm, 0.9% for nodules of 4-7 mm and 18% for nodules of 8-20 mm
Fleischner Society guidelines 2013
| Size (mm) | Low risk | High risk |
|---|---|---|
| ≤4 | No follow-up | 12 months |
| >4–6 | 12 months | 6 months, then 18–24 months |
| >6–8 | 6–12 months, then 18–24 months | 3–6 months, 9–12 and 24 months |
| >8 | 3, 9 and 24 months + positron emission tomography ± biopsy | Same as low risk |
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