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hematologyHas Critical Values
White Blood Cell Count
WBC· also: TLC
Clinical Overview
WBC count measures the total number of white blood cells (leukocytes). Elevated WBC suggests infection or inflammation; low WBC may indicate bone marrow suppression.
Reference RangesWHO/IFCC standards
| Age Group | Reference Range | Unit | Notes |
|---|---|---|---|
| Adults (18–64) | 4.5 – 11 | ×10³/µL | — |
| Children / Pediatric | 5 – 15 | ×10³/µL | Higher in young children |
Also reported in: ×10⁹/L.
Critical (Panic) Values
Critical Low: < 2 ×10³/µL. Critical High: > 30 ×10³/µL. Values outside these limits require immediate clinical attention.
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Related Topics
infectionCBCleukocytesimmunity