Analysis of Urine and Body Fluids (AUBF) Practice Test

Question: 1 / 460

What is the appearance of leucine in urine analysis?

Concentric circles with radial striations

The appearance of leucine in urine analysis is characterized by concentric circles with radial striations. This unique morphology is typically observed in urine samples containing leucine, which can indicate certain metabolic disorders, such as maple syrup urine disease or other amino acidurias.

Leucine crystals are specifically identified due to their distinctive structure, which helps differentiate them from other types of urinary crystals. The concentric circle formation and radial striations provide a visual cue that laboratorians can use to recognize these specific crystals under polarized light microscopy.

In urine analysis, recognizing the specific characteristics of various crystals is crucial, as it aids in diagnosing underlying health issues related to amino acid metabolism.

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Clumped needles with distinct brown color

Colorless needles forming bundles

Needle-shaped crystals with bright red color

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