📊 Platelet-to-Lymphocyte Ratio (PLR)
UseWhen to use: research-style risk stratification when CBC differentials available.
StrataHigher PLR bands are disease-specific — use local cutoffs.
LimitsWhen not to use: as a standalone diagnostic test. · Pitfall: steroids/chemo distorting counts. · Cutoffs vary widely by cohort.
SourceStandard PLR arithmetic
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
PLT÷lymph.
When to use
When to use: research-style risk stratification when CBC differentials available.
How it works
PLR = platelets / absolute lymphocytes.
Key points
- PLT÷lymph.
- Inflammation adjunct.
- Next: clinical context.
References
- Standard PLR arithmetic
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.
| Platelets | 250 ×10⁹/L |
|---|---|
| Lymphocyte input | Absolute lymphocytes (×10⁹/L) |
| Absolute lymphocytes (if selected) | 2.0 ×10⁹/L |
| WBC (if % mode) | 7.0 ×10⁹/L |
| Lymphocytes % (if % mode) | 30 % |
→PLR125.0
- Lymph used：2.00 ×10⁹/L
- Cue：<150 — lower common research cutoff band
| Platelets | 250 ×10⁹/L |
|---|---|
| Lymphocyte input | WBC + lymphocyte % |
| Absolute lymphocytes (if selected) | 2.0 ×10⁹/L |
| WBC (if % mode) | 7.0 ×10⁹/L |
| Lymphocytes % (if % mode) | 30 % |
→PLR119.0
- Lymph used：2.10 ×10⁹/L
- Cue：<150 — lower common research cutoff band
Verification & sources · governance
FAQ
Frequently asked questions
- Does Platelet-to-Lymphocyte Ratio (PLR) 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 Platelet-to-Lymphocyte Ratio (PLR) calculated in practice? Can you show a worked example?
- Inputs: Platelets 250 ×10⁹/L, Lymphocyte input Absolute lymphocytes (×10⁹/L), Absolute lymphocytes (if selected) 2.0 ×10⁹/L, WBC (if % mode) 7.0 ×10⁹/L, Lymphocytes % (if % mode) 30 % → Result: PLR 125.0（Lymph used: 2.00 ×10⁹/L, Cue: <150 — lower common research cutoff band） Inputs: Platelets 250 ×10⁹/L, Lymphocyte input WBC + lymphocyte %, Absolute lymphocytes (if selected) 2.0 ×10⁹/L, WBC (if % mode) 7.0 ×10⁹/L, Lymphocytes % (if % mode) 30 % → Result: PLR 119.0（Lymph used: 2.10 ×10⁹/L, Cue: <150 — lower common research cutoff band）