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.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

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
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The struvite stone is also known as the triple phosphate or magnesium ammonium phosphate stone as well as the 'infection stone' given its strong association with recurrent UTIs and an alkaline pH urine.
Recurrent urinary tract infections in a 48-year-old female
In general, calcium phosphate stones have the greatest density, followed by calcium oxalate and magnesium ammonium phosphate stones. Cystine calculi are only faintly radiodense, while uric acid stones are usually entirely radiolucent.
Case report of an unusually large renal calculus
Magnesium ammonium phosphate stones account for 10-15% of kidney stones.
Kidney stones and the long distance athlete

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