[Hematuria and nephritic sediment]

Area of Science:

• Nephrology
• Urology
• Clinical Pathology

Background:

• Hematuria, or blood in urine, can stem from vigorous physical exercise or serious urinary tract conditions.
• Differentiating these causes is crucial for appropriate patient management and timely intervention.
• Microscopic examination of urine sediment offers valuable diagnostic clues.

Purpose of the Study:

• To highlight the diagnostic utility of microscopic urinalysis in evaluating hematuria.
• To differentiate between exercise-induced hematuria and pathological causes.
• To guide subsequent diagnostic investigations based on urinary sediment findings.

Main Methods:

• Microscopic examination of urine sediment for erythrocytes, casts, and leukocytes.
• Analysis of erythrocyte morphology, specifically looking for dysmorphic forms (acanthocytes).
• Correlation of microscopic findings with clinical context (age, comorbidities, medications).

Main Results:

• Dysmorphic erythrocytes (acanthocytes) in over 17% of red blood cells strongly suggest a glomerular origin.
• Presence of various urinary casts indicates underlying kidney disease.
• Sterile leukocyturia can point towards interstitial nephritis of diverse etiologies (atheroembolic, drug-induced, viral).

Conclusions:

• Microscopic urinalysis is a key tool for hematuria evaluation, aiding in differential diagnosis.
• Specific urinary sediment findings, like acanthocytes and casts, help identify glomerular or renal pathology.
• Clinical context is essential for interpreting nephritic sediment findings and guiding further diagnostics.