🫁 Pulmonary Nodule Lung-RADS v2022 Category
Compute the Lung-RADS v2022 category from nodule type and size at baseline screening, with follow-up management. Instant, browser-side.
For screening only — use Fleischner for incidental non-screening nodules.
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When to use
Classify a nodule on low-dose CT lung-cancer screening and set the follow-up.
How it works
Solid: < 6 → 2, 6–< 8 → 3, 8–< 15 → 4A, ≥ 15 → 4B. Part-solid scored by solid component (< 6 → 3, 6–< 8 → 4A, ≥ 8 → 4B). Pure ground-glass: < 30 → 2, ≥ 30 → 3.
Key points
- For screening only — use Fleischner for incidental non-screening nodules.
- Additional suspicious features (spiculation, bubbly lucency, adenopathy) upgrade to 4X.
- New or growing nodules use lower thresholds (growth ≥ 1.5 mm).
- 4A → 3-month LDCT (add PET/CT if solid component ≥ 8 mm); 4B → diagnostic CT/PET/sampling.
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 |
|---|---|
| Total nodule diameter | 9 mm |
| Solid component diameter (if part-solid) | 5 mm |
→CategoryLung-RADS 4A
- Category：Lung-RADS 4A (malignancy likelihood 5–15%)
- Management：Suspicious: 3-month LDCT; add PET/CT if solid component ≥ 8 mm
- Read：Type: solid, total diameter 9 mm (baseline-screen thresholds)
| Nodule type | Pure ground-glass |
|---|---|
| Total nodule diameter | 9 mm |
| Solid component diameter (if part-solid) | 5 mm |
→CategoryLung-RADS 2
- Category：Lung-RADS 2 (malignancy likelihood < 1%)
- Management：Benign appearance/behaviour: 12-month LDCT, continue annual screening
- Read：Type: pure ground-glass, total diameter 9 mm (baseline-screen thresholds)
Frequently asked questions
- What is Pulmonary Nodule Lung-RADS v2022 Category?
- Compute the Lung-RADS v2022 category from nodule type and size at baseline screening, with follow-up management. Instant, browser-side.
- How is Pulmonary Nodule Lung-RADS v2022 Category calculated? What is the core formula?
- Solid: < 6 → 2, 6–< 8 → 3, 8–< 15 → 4A, ≥ 15 → 4B. Part-solid scored by solid component (< 6 → 3, 6–< 8 → 4A, ≥ 8 → 4B). Pure ground-glass: < 30 → 2, ≥ 30 → 3.
- When is Pulmonary Nodule Lung-RADS v2022 Category used?
- Classify a nodule on low-dose CT lung-cancer screening and set the follow-up.
- What are the key clinical points for Pulmonary Nodule Lung-RADS v2022 Category?
- For screening only — use Fleischner for incidental non-screening nodules. Additional suspicious features (spiculation, bubbly lucency, adenopathy) upgrade to 4X. New or growing nodules use lower thresholds (growth ≥ 1.5 mm). 4A → 3-month LDCT (add PET/CT if solid component ≥ 8 mm); 4B → diagnostic CT/PET/sampling.
- What are the limits and cautions when using Pulmonary Nodule Lung-RADS v2022 Category?
- 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 Lung-RADS v2022 Category calculated in practice? Can you show a worked example?
- Inputs: Nodule type Solid, Total nodule diameter 9 mm, Solid component diameter (if part-solid) 5 mm → Result: Category Lung-RADS 4A（Category: Lung-RADS 4A (malignancy likelihood 5–15%), Management: Suspicious: 3-month LDCT; add PET/CT if solid component ≥ 8 mm, Read: Type: solid, total diameter 9 mm (baseline-screen thresholds)） Inputs: Nodule type Pure ground-glass, Total nodule diameter 9 mm, Solid component diameter (if part-solid) 5 mm → Result: Category Lung-RADS 2（Category: Lung-RADS 2 (malignancy likelihood < 1%), Management: Benign appearance/behaviour: 12-month LDCT, continue annual screening, Read: Type: pure ground-glass, total diameter 9 mm (baseline-screen thresholds)）