Urolithiasis pp 935-942 | Cite as

Forms of Ammonium Urate Presentation in Urinary Calculi of Non-Infectious and Infectious Origin

  • E. García de la Peña
  • L. Cifuentes Delatte


Until now infrequent reference has been made to ammonium urate and its presence in urinary calculi. Important elements such as the crystallization pattern of ammonium urate, whether or not more than one is possible and under what conditions each pattern is produced have not been specified. It is accepted that ammonium urate was often found in Europe in urinary calculi until the beginning of this century 1–3. Now it is found only rarely at least in industrialized countries4–19, but it is still one of the main components of urinary calculi in some oriental countries15,17,18,20,22. This drop in the frequency rate in Europe is due to a higher standard of living; therefore, the incidence of ammonium urate in urinary calculi seems to be directly related to socio-economic factors23.


Calcium Monohydrate Oxalate Urinary Calculus Calcium Oxalate Monohydrate Alkaline Urine Magnesium Phosphate 


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Copyright information

© Springer Science+Business Media New York 1981

Authors and Affiliations

  • E. García de la Peña
    • 1
  • L. Cifuentes Delatte
    • 1
  1. 1.Department of Urology, Laboratorio de UrolithiasisFundación Jiménez DíazMadridSpain

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