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Waxy Casts

Casts are clusters of urinary sediment elements (red blood cells, white blood cells, fat bodies, etc.) wrapped in a protein matrix. Cast formation necessarily occurs in the kidney tubules, and the contents of the casts indicate the nature of the abnormalities occurring in the kidney itself.

Waxy casts probably represent the last stage of granular cast degeneration. Waxy casts are non-specific and can be observed in a wide variety of acute and chronic kidney diseases. However, they indicate a certain degree of slowing in urine formation and, therefore, possibly more advanced kidney disease.

Term of the Week

Hot zone

A hot zone is a section of a facility (sometimes an entire facility or even a city district) where there is a high risk of contamination by patients with an infectious disease. All individuals entering a hot zone must respect appropriate protective measures. By analogy, “cold zone” and “warm zone” are used to refer to areas where there is no infected individual or only individuals suspected of having an infection.