🔍 Pulmonary Nodule Follow-up (Fleischner 2017)
Get CT follow-up advice for incidental pulmonary nodules per the Fleischner Society 2017 guideline, by type, number, size and risk. Instant, browser-side.
Not for known cancer/primary tumour, immunosuppression or lung-cancer screening (use Lung-RADS for screening).
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When to use
Decide the follow-up interval and modality for an incidental (non-screening) pulmonary nodule in patients ≥ 35.
How it works
Recommendations vary by solid/ground-glass/part-solid type, single vs multiple, size (< 6, 6–8, > 8 mm) and low vs high risk; measured as the average of long and short axes on thin sections.
Key points
- Not for known cancer/primary tumour, immunosuppression or lung-cancer screening (use Lung-RADS for screening).
- Solid nodules < 6 mm in low-risk patients need no routine follow-up.
- Persistent ground-glass nodules ≥ 6 mm are followed long-term (to 5 years).
- High-risk features include smoking, older age, emphysema/fibrosis, upper-lobe location and family history.
References
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Nodule type | Solid |
|---|---|
| Number | Single |
| Maximum nodule diameter | 7 mm |
| Risk (for solid nodules) | Low risk |
→Follow-up adviceCT at 6–12 mo
- Nodule：Solid · single
- Max diameter：7 mm
- Advice：Low risk: CT at 6–12 months
| Nodule type | Part-solid |
|---|---|
| Number | Multiple |
| Maximum nodule diameter | 7 mm |
| Risk (for solid nodules) | High risk |
→Follow-up adviceCT at 3–6 mo
- Nodule：Part-solid · multiple
- Max diameter：7 mm
- Advice：CT at 3–6 months, then manage per the most suspicious nodule
Frequently asked questions
- What is Pulmonary Nodule Follow-up (Fleischner 2017)?
- Get CT follow-up advice for incidental pulmonary nodules per the Fleischner Society 2017 guideline, by type, number, size and risk. Instant, browser-side.
- How is Pulmonary Nodule Follow-up (Fleischner 2017) calculated? What is the core formula?
- Recommendations vary by solid/ground-glass/part-solid type, single vs multiple, size (< 6, 6–8, > 8 mm) and low vs high risk; measured as the average of long and short axes on thin sections.
- When is Pulmonary Nodule Follow-up (Fleischner 2017) used?
- Decide the follow-up interval and modality for an incidental (non-screening) pulmonary nodule in patients ≥ 35.
- What are the key clinical points for Pulmonary Nodule Follow-up (Fleischner 2017)?
- Not for known cancer/primary tumour, immunosuppression or lung-cancer screening (use Lung-RADS for screening). Solid nodules < 6 mm in low-risk patients need no routine follow-up. Persistent ground-glass nodules ≥ 6 mm are followed long-term (to 5 years). High-risk features include smoking, older age, emphysema/fibrosis, upper-lobe location and family history.
- What are the limits and cautions when using Pulmonary Nodule Follow-up (Fleischner 2017)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is Pulmonary Nodule Follow-up (Fleischner 2017) calculated in practice? Can you show a worked example?
- Inputs: Nodule type Solid, Number Single, Maximum nodule diameter 7 mm, Risk (for solid nodules) Low risk → Result: Follow-up advice CT at 6–12 mo（Nodule: Solid · single, Max diameter: 7 mm, Advice: Low risk: CT at 6–12 months） Inputs: Nodule type Part-solid, Number Multiple, Maximum nodule diameter 7 mm, Risk (for solid nodules) High risk → Result: Follow-up advice CT at 3–6 mo（Nodule: Part-solid · multiple, Max diameter: 7 mm, Advice: CT at 3–6 months, then manage per the most suspicious nodule）