Pulmonary Nodule Follow-up (Fleischner 2017) — free guideline decision tool
Get CT follow-up advice for incidental pulmonary nodules per the Fleischner Society 2017 guideline, by type, number, size and risk. Instant, browser-side.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
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
Common 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）
Run Pulmonary Nodule Follow-up (Fleischner 2017) now
Get CT follow-up advice for incidental pulmonary nodules per the Fleischner Society 2017 guideline, by type, number, size and risk. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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