🦵 ALT-70 Score (Lower Extremity Cellulitis)
UseWhen to use: adult unilateral leg redness when cellulitis vs venous stasis/mimic is unclear.
Strata0–2 unlikely, 3–4 indeterminate, ≥5 likely cellulitis.
LimitsWhen not to use: children, upper extremity, or clear abscess needing … · Pitfall: missing necrotizing infection red flags. · Still examine for drainable collections.
SourceRaff AB et al. JAAD 2017 (ALT-70)
This-shift next steps
After scoring: open the scene pack, peer scores, and the matching pathway. Local reference — no HIS write.
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Methodology · worked example, guidelines & full notes
0–7 points.
When to use
When to use: adult unilateral leg redness when cellulitis vs venous stasis/mimic is unclear.
How it works
Asymmetry 3 + WBC≥10 (1) + HR≥90 (1) + age≥70 (2); total 0–7.
Key points
- 0–7 points.
- ≥5 likely cellulitis.
- Next: LRINEC if nec fasc concern.
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.
| Asymmetry (unilateral involvement) | No (0) |
|---|---|
| Leukocytosis (WBC ≥ 10 × 10⁹/L) | No (0) |
| Tachycardia (HR ≥ 90 bpm) | No (0) |
| Age ≥ 70 years | No (0) |
→ALT-700/7
- Band：Unlikely cellulitis — consider mimics (stasis, venous eczema, gout, DVT)
- Cutoffs：0–2 unlikely · 3–4 indeterminate · ≥5 likely
| Asymmetry (unilateral involvement) | Yes (3) |
|---|---|
| Leukocytosis (WBC ≥ 10 × 10⁹/L) | Yes (1) |
| Tachycardia (HR ≥ 90 bpm) | Yes (1) |
| Age ≥ 70 years | Yes (2) |
→ALT-707/7
- Band：Likely true cellulitis
- Cutoffs：0–2 unlikely · 3–4 indeterminate · ≥5 likely
Verification & sources · governance
FAQ
Frequently asked questions
- Does ALT-70 Score (Lower Extremity Cellulitis) upload patient data? Where is it calculated?
- Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
- How is ALT-70 Score (Lower Extremity Cellulitis) calculated in practice? Can you show a worked example?
- Inputs: Asymmetry (unilateral involvement) No (0), Leukocytosis (WBC ≥ 10 × 10⁹/L) No (0), Tachycardia (HR ≥ 90 bpm) No (0), Age ≥ 70 years No (0) → Result: ALT-70 0 /7（Band: Unlikely cellulitis — consider mimics (stasis, venous eczema, gout, DVT), Cutoffs: 0–2 unlikely · 3–4 indeterminate · ≥5 likely） Inputs: Asymmetry (unilateral involvement) Yes (3), Leukocytosis (WBC ≥ 10 × 10⁹/L) Yes (1), Tachycardia (HR ≥ 90 bpm) Yes (1), Age ≥ 70 years Yes (2) → Result: ALT-70 7 /7（Band: Likely true cellulitis, Cutoffs: 0–2 unlikely · 3–4 indeterminate · ≥5 likely）