Understanding Lab Tests for Leukocytosis
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Leukocytosis is a medical condition characterized by an elevated white blood cell (WBC) count in the blood. This condition is typically detected through blood testing and can indicate various underlying health issues including infections, inflammation, certain cancers, or stress responses.
Recommended Test
Complete Blood Count / CBC (includes Differential and Platelets)
This comprehensive blood test directly measures white blood cell count and provides a detailed breakdown of different white blood cell types through the differential count. It is the primary diagnostic tool for detecting leukocytosis and can help identify whether the elevated count is due to infection, inflammation, malignancies, or physical and emotional stress.
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Diagnosing Leukocytosis
Since leukocytosis often occurs without obvious symptoms, blood testing is the primary method for detection and diagnosis. A Complete Blood Count (CBC) provides detailed information about white blood cell levels and can help healthcare providers determine the underlying cause and appropriate treatment approach.
Understanding Your Results
The CBC with differential not only confirms the presence of leukocytosis but also provides valuable information about which specific types of white blood cells are elevated. This detailed analysis helps healthcare providers determine the most likely cause and develop an appropriate treatment plan.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment.
