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Urine sediment showing struvite (magnesium ammonium phosphate) crystals
Urine sediment showing struvite (magnesium ammonium phosphate) crystals
Urine sediment showing multiple "coffin lid" magnesium ammonium phosphate crystals (struvite) that form only in an alkaline urine (pH usually above 7.0) caused by an upper urinary tract infection with a urease-producing bacteria.
Courtesy of Harvard Medical School.
Graphic 54594 Version 6.0