THE CLINICAL SPECTRUM OF AMMONIUM URATE RENAL CALCULI

Ammonium acid urate may occur with urealytic urinary-tract infections where it is most often found with magnesium ammonium phosphate1. Ammonium urate may be present in sterile urine with endemic bladder stones which were common in certain areas of nineteenth-century Europe and are occasionally found today in India, Turkey, or southeast Asia26. In addition, this calculus was reported by us to exist in sterile urine of patients with a certain form of laxative abuse7. A new cause for this form of urinary calculus has been discovered in three patients with ileal resection and ileostomy/or massive colonic resection. Their clinical profiles, which are strikingly similar to the patients with laxative abuse, are presented in the following report.