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Related Experiment Videos

Microscopic hematuria.

H L Corwin1, M D Silverstein

  • 1Division of Nephrology, Tufts-New England Medical Center, Boston, Massachusetts.

Clinics in Laboratory Medicine
|September 1, 1988
PubMed
Summary
This summary is machine-generated.

Microscopic hematuria, identified by red blood cells (RBCs) in urine, is common yet rarely indicates serious urologic disease. Current diagnostic approaches for asymptomatic cases remain uncertain, highlighting a need for clearer evaluation guidelines.

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Area of Science:

  • Urology
  • Nephrology
  • Clinical Diagnostics

Background:

  • Microscopic hematuria affects up to 13% of the population.
  • Red blood cell (RBC) counts in urine sediment vary with urinalysis technique.
  • Establishing a definitive normal RBC excretion threshold is challenging.

Purpose of the Study:

  • To review the diagnostic challenges and uncertainties in evaluating asymptomatic microscopic hematuria.
  • To discuss the prevalence and low yield of serious urologic disease in patients with microscopic hematuria.

Main Methods:

  • Review of existing literature and diagnostic algorithms for microscopic hematuria.
  • Analysis of the variability in RBC detection based on urinalysis methods.
  • Discussion of the established reference range for RBCs per high power field (HPF).

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Main Results:

  • Microscopic hematuria is prevalent but infrequently associated with significant urologic pathology.
  • A threshold of 3-8 RBCs/HPF is commonly accepted to differentiate normal from abnormal hematuria.
  • Diagnostic evaluation extent for asymptomatic cases remains a subject of debate.

Conclusions:

  • Despite high prevalence, serious urologic disease is uncommon in microscopic hematuria.
  • Uncertainty persists regarding the optimal diagnostic workup for asymptomatic microscopic hematuria.
  • Further research is needed to standardize evaluation protocols for this common finding.