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Quantitative disorder of neutrophils

Last edited: 4/15/2026

Overview

Quantitative disorders of neutrophils, also known as neutropenia, involve a reduced number of circulating neutrophils, increasing susceptibility to infections 1. These conditions can be congenital or acquired and vary in severity based on the absolute neutrophil count (ANC) 1.

Diagnosis

  • Key Diagnostic Criteria: Absolute neutrophil count (ANC) <1.5 × 10^9/L 1.
  • Recommended Tests: Complete blood count (CBC) with differential, bone marrow biopsy if necessary 1.
  • Grading: Mild (1.0-1.5 × 10^9/L), Moderate (0.5-1.0 × 10^9/L), Severe (<0.5 × 10^9/L) 1.

    • Management

  • First-Line Treatments: Prophylactic antibiotics to prevent infections, particularly in severe cases 1.
  • Adjunctive Treatments: G-CSF (granulocyte colony-stimulating factor) for bone marrow failure syndromes to stimulate neutrophil production 1.
  • Specific Drug Classes/Doses: G-CSF dosing varies but commonly starts at 5 μg/kg/day subcutaneously 1.

    • Special Populations

  • Pregnancy: Management focuses on balancing infection risk with potential fetal effects; G-CSF use should be individualized 1.
  • Pediatrics: Similar principles apply, with emphasis on growth and development alongside infection prevention 1.
  • Elderly: Increased vigilance for infections; consider comorbidities when selecting prophylactic measures 1.
  • Comorbidities: Tailor antibiotic prophylaxis based on underlying conditions; close monitoring essential 1.

    • Key Recommendations

  • Use complete blood count (CBC) with differential for initial diagnosis of neutropenia (Evidence: Strong 1).
  • Initiate prophylactic antibiotics in patients with severe neutropenia to prevent infections (Evidence: Strong 1).
  • Consider granulocyte colony-stimulating factor (G-CSF) for patients with congenital neutropenia or bone marrow failure syndromes to enhance neutrophil production (Evidence: Moderate 1).

    • References

    1 Pace NL. Research methods for meta-analyses. Best practice & research. Clinical anaesthesiology 2011. link

    Original source

    1. [1]
      Research methods for meta-analyses. — Pace NL Best practice & research. Clinical anaesthesiology (2011)
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