magnesium ammonium phosphate stone

magnesium ammonium phosphate stone

A type of kidney stone, which is more common in women, linked to urinary tract infections (e.g., by Proteus spp) that produce specific enzymes. MAPSs can become very large, fill the renal pelvis, develop a staghorn appearance, obstruct the urinary tract and cause kidney damage.
 
Specimen
Stones obtained surgically or after being “passed” in the urine.

Method
Light microscopy, optical crystallography, IR spectroscopy, X-ray diffraction.

magnesium ammonium phosphate stone

Struvite stone A type of stone more common in ♀, linked to UTIs–eg, by Proteus spp, which produce specific enzymes; MAPSs can become very large, fill the renal pelvis, develop a staghorn appearance, obstruct the urinary tract and cause kidney damage
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Magnesium ammonium phosphate stones account for 10-15% of kidney stones.