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Related Experiment Videos

Acanthocyturia--a characteristic marker for glomerular bleeding.

H Köhler1, E Wandel, B Brunck

  • 1I. Medizinische Klinik und Poliklinik der Johannes Gutenberg-Universität Mainz, Germany.

Kidney International
|July 1, 1991
PubMed
Summary

Acanthocytes, a unique red blood cell shape, are key indicators of glomerular bleeding. This finding improves the diagnosis of kidney diseases using urine tests.

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Area of Science:

  • Nephrology
  • Urology
  • Hematology

Background:

  • Erythrocyte morphology in urine aids in differentiating glomerular from non-glomerular bleeding.
  • Current definitions of dysmorphic red blood cells lack specificity for glomerular bleeding.

Purpose of the Study:

  • To identify specific erythrocyte morphologies indicative of glomerular bleeding.
  • To establish the diagnostic value of acanthocyturia in hematuria evaluation.

Main Methods:

  • Phase contrast microscopic examination (PCM) of urine from 351 hematuria patients and 33 controls.
  • Detailed hematological classification of various dysmorphic red blood cells.
  • Analysis of acanthocyte prevalence in biopsy-proven glomerulonephritis versus non-glomerular diseases.

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Main Results:

  • Most dysmorphic red cells (echinocytes, ghost cells, etc.) were not specific for glomerular bleeding.
  • Acanthocytes (ring form with protrusions) showed a strong correlation with glomerular disease.
  • Acanthocyturia (≥5% of red cells) had a sensitivity of 52% and specificity of 98% for glomerulonephritis.

Conclusions:

  • Acanthocyturia is a highly specific marker for glomerular bleeding.
  • Focusing on acanthocyte detection in urine improves hematuria diagnosis.
  • Acanthocyturia is valuable even with low erythrocyte counts.