[Evaluation of dysmorphic red cells in the urinary sediment]

Area of Science:

• Nephrology
• Urology
• Pathology

Context:

• The origin of hematuria is often determined by red blood cell morphology.
• Dysmorphic red cells suggest glomerular bleeding, while isomorphic cells indicate non-glomerular sources.
• Acanthocytes (AC) are recognized as a key indicator of glomerular bleeding.

Purpose:

• To investigate the formation mechanism of acanthocytes (AC) in vitro.
• To confirm the relationship between red blood cell morphology and the source of hematuria.
• To validate the nephron passage theory in the development of acanthocyturia in glomerular diseases.

Summary:

• Morphological examination of urinary red blood cells differentiates glomerular from non-glomerular bleeding.
• Acanthocytes (AC) are a reliable marker for glomerular bleeding, with >5% acanthocyturia being predictive.
• In vitro experiments demonstrated AC formation under specific osmotic and ionic conditions simulating the collecting tubules, supporting the nephron passage theory.

Impact:

• Provides a clearer understanding of the mechanisms behind acanthocyte formation in glomerular diseases.
• Reinforces the diagnostic value of urinary red blood cell morphology in identifying the source of hematuria.
• Offers insights into the pathophysiology of hematuria in kidney disorders, aiding clinical diagnosis and management.