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Ammonium Biurate Crystals in Urine Sediment: Microscopy

Morphology of ammonium biurate crystals in urine sediment in a dog with liver failure after cycasin intoxication. Microscopy features.

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Urine sediment microscopy: characteristic ammonium biurate crystals with spicules
Urine sediment microscopy: characteristic ammonium biurate crystals with spicules
Urine microscopy: cluster of ammonium biurate crystals and an artifact thread
Urine microscopy: cluster of ammonium biurate crystals and an artifact thread
Sago palm (Cycas), source of hepatotoxic glycoside cycasin
Sago palm (Cycas), source of hepatotoxic glycoside cycasin

🔬 Urine microscopy. Ammonium biurate crystalluria in a dog with acquired liver failure caused by cycasin glycoside intoxication after eating sago palm. Source: Valenciano A. C. - Diagnostic Cytology and Hematology, 2020 Cycasin is a glycoside containing methylhydrazine, which has hepatotoxic and neurotoxic effects. It is found in plants of the genus Cycas, including the sago palm.

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