White Blood Cells (Microscopic)
- Sample Type
- Standard
- Fasting
- No
- Unit
- cells/HPF
The microscopic evaluation of White Blood Cells (WBCs) in urine, known as pyuria, is a primary indicator of inflammation or infection within the urinary tract. In a healthy state, few or no WBCs are present. When the immune system responds to pathogens (bacteria, fungi) or physical trauma (calculi), neutrophils migrate to the site of irritation and are subsequently excreted. This component is critical in the 'Urine Routine' panel to differentiate between simple contamination and active pathology like Cystitis, Pyelonephritis, or Urethritis.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
False positives can occur due to contamination from vaginal secretions or menstruation. Conversely, 'sterile pyuria' (WBCs without bacterial growth) may occur in cases of renal tuberculosis, interstitial cystitis, or after recent antibiotic use, requiring specialized follow-up.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for White Blood Cells (Microscopic):
Official Sources
Research & Guidelines
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
Get Notified When Dr. Babu Is Available