Uric acids and amorphous urates
Uric acid Uric acid crystallizes in the orthorombic system. Uric acid crystals can appear under several shapes. The classic…
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Iatrogenic crystalluria
The presence of iatrogenic crystals is a rare event. Except for the Indinavir crystal, a light crystalluria due to a medication or from a…
Rare crystals
Cystine The cystine is seen as colorless hexagonal plates. The solubility of the cystine is much larger in alkaline urine, with…
Calcium oxalates
In the urinary sediment, one can find two forms of calcium oxalate crystals. The most frequent form is the di-hydrated calcium oxa…
Phosphate crystals
Amorphous phosphates Amorphous phosphates is the name given to a granular precipitate containing calcium and phosphate in an al…
About crystals
Clinical significance Except for the cystine crystals and a few others, the majority of crystals found in the urinary sediment are of l…
The blood casts
About blood casts Blood casts are of prime clinical significance. Even a rare finding is indicative of renal "glomerular" blee…