Clinical Assessment: Normal Laboratory Values
These laboratory values are completely normal for an 18-year-old male and require no intervention or further workup.
Laboratory Value Analysis
The presented values fall within normal reference ranges for a healthy young adult:
- WBC 4.3 × 10⁹/L: Normal (reference range 4.0-11.0 × 10⁹/L)
- Absolute Neutrophil Count 1,574/µL (1.574 × 10⁹/L): Normal (reference range 1.5-8.0 × 10⁹/L)
- Hemoglobin 15.7 g/dL: Normal (male reference range 13.5-17.5 g/dL)
- Hematocrit 46%: Normal (male reference range 41-53%)
Key Clinical Considerations
Neutrophil Count Context
The ANC of 1,574/µL is just above the conventional neutropenia threshold of 1,500/µL (1.5 × 10⁹/L), but this is not clinically significant 1. This patient does not meet criteria for neutropenia requiring intervention, which would necessitate:
- Severe neutropenia: ANC < 500/µL requiring immediate attention 1, 2
- Moderate neutropenia: ANC 500-1,000/µL requiring monitoring 3
- Mild neutropenia: ANC 1,000-1,500/µL, typically benign 4
Ethnic Considerations
If this patient is of African, Middle Eastern, or certain other ethnic descents, even lower neutrophil counts may be physiologically normal. Benign ethnic neutropenia is present in 25-50% of persons of African descent, with ANC values commonly ranging from 1,000-1,500/µL without increased infection risk 5, 6. The Duffy-null phenotype [Fy(a-b-)] is associated with reference intervals of ANC 1.01-4.34 × 10³/µL 7.
Management Recommendation
No action required. This patient should:
- Continue routine health maintenance
- No hematologic follow-up needed
- No growth factor support indicated
- No bone marrow evaluation warranted
- No infectious disease precautions necessary
The patient's blood counts indicate normal bone marrow function and adequate immune capacity. These values do not suggest any underlying hematologic disorder, immunodeficiency, or increased infection risk 8.