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Amorphous Crystals

Amorphous crystals are by definition crystals with no identifiable characteristic shape. Amorphous crystals observed at an acid pH (less than 6) are amorphous urate crystals. At a pH greater than 7, they are amorphous phosphate crystals. Between pH 6 and pH 7, they become very difficult to distinguish.

The presence of amorphous crystals is generally of little clinical significance. Their formation is caused by a combination of factors, including decreased urine volume combined with changes in urine pH and often the presence of large quantities of uric acid (meat consumption), or calcium (dairy products) in the diet.

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.