🔬 WBC Differential Interpretation
Differential of neutrophil, lymphocyte, eosinophil, monocyte and basophil increases and decreases, with morphology and critical-value cues. Browser-side reference.
Interpret absolute counts, not just percentages.
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When to use
Use absolute counts and the trend, with left shift, atypia and morphology, to triage a white-cell abnormality.
How it works
Severe neutropenia: ANC < 0.5 ×10⁹/L; with fever = febrile neutropenia (emergency).
Key points
- Interpret absolute counts, not just percentages.
- Febrile neutropenia is an emergency needing empiric antibiotics.
- Peripheral blasts → suspect acute leukaemia, urgent haematology consult.
- Unexplained pancytopenia needs a marrow examination.
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.
| View | Neutrophils |
|---|
→InterpretationNeutrophils
- Increased：Bacterial infection, inflammation, stress/steroids, smoking, myeloproliferative; left shift (bands/immature), toxic granulation/Döhle bodies suggest infection
- Decreased：Viral, drugs, chemotherapy, severe infection (consumption), autoimmune, megaloblastic anaemia
- ⚠ Severe neutropenia：ANC < 0.5 ×10⁹/L high infection risk; with fever = febrile neutropenia (emergency, empiric antibiotics)
| View | Morphology/critical values |
|---|
→InterpretationMorphology / critical values
- Blasts/immature cells：Peripheral blasts → suspect acute leukaemia, urgent workup, haematology consult
- Leukaemoid reaction vs CML：Severe infection can cause a leukaemoid reaction; CML shows BCR-ABL/basophilia/low LAP
- Pancytopenia：Marrow failure/infiltration or peripheral destruction — needs marrow examination
Frequently asked questions
- What is WBC Differential Interpretation?
- Differential of neutrophil, lymphocyte, eosinophil, monocyte and basophil increases and decreases, with morphology and critical-value cues. Browser-side reference.
- How is WBC Differential Interpretation calculated? What is the core formula?
- Severe neutropenia: ANC < 0.5 ×10⁹/L; with fever = febrile neutropenia (emergency).
- When is WBC Differential Interpretation used?
- Use absolute counts and the trend, with left shift, atypia and morphology, to triage a white-cell abnormality.
- What are the key clinical points for WBC Differential Interpretation?
- Interpret absolute counts, not just percentages. Febrile neutropenia is an emergency needing empiric antibiotics. Peripheral blasts → suspect acute leukaemia, urgent haematology consult. Unexplained pancytopenia needs a marrow examination.
- What are the limits and cautions when using WBC Differential Interpretation?
- 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 WBC Differential Interpretation calculated in practice? Can you show a worked example?
- Inputs: View Neutrophils → Result: Interpretation Neutrophils（Increased: Bacterial infection, inflammation, stress/steroids, smoking, myeloproliferative; left shift (bands/immature), toxic granulation/Döhle bodies suggest infection, Decreased: Viral, drugs, chemotherapy, severe infection (consumption), autoimmune, megaloblastic anaemia, ⚠ Severe neutropenia: ANC < 0.5 ×10⁹/L high infection risk; with fever = febrile neutropenia (emergency, empiric antibiotics)） Inputs: View Morphology/critical values → Result: Interpretation Morphology / critical values（Blasts/immature cells: Peripheral blasts → suspect acute leukaemia, urgent workup, haematology consult, Leukaemoid reaction vs CML: Severe infection can cause a leukaemoid reaction; CML shows BCR-ABL/basophilia/low LAP, Pancytopenia: Marrow failure/infiltration or peripheral destruction — needs marrow examination）