Cylindruria

Area of Science:

• Nephrology
• Clinical Urinalysis
• Biochemistry

Background:

• Urinary casts are cylindrical structures formed in renal tubules from Tamm-Horsfall glycoprotein (THG).
• Their formation is influenced by urine osmolality and pH, occurring in both physiological and pathological states.
• Casts are present in healthy individuals and various renal and non-renal diseases.

Purpose of the Study:

• To highlight the significance of morphological analysis of urinary casts in urinalysis.
• To emphasize the role of casts in the diagnosis of renal disorders.
• To underscore the importance of proper training for laboratory professionals in cast identification.

Main Methods:

• Morphological classification of urinary casts.
• Analysis of factors influencing cast formation.
• Review of clinical significance in urinalysis.

Main Results:

• Casts are diverse, classified by morphology (hyaline, granular, waxy, fatty, cellular, etc.).
• Presence of casts is indicative of various physiological and pathological conditions.
• Accurate identification is critical for diagnosing renal conditions.

Conclusions:

• Morphological analysis of urinary casts is a cornerstone of urinalysis.
• Proper identification and classification of casts are essential for accurate renal disorder diagnosis.
• Training laboratory professionals is crucial for effective clinical urinalysis.