title: Mineral composition of 103 stones from Iran.
abstract: The mineral composition of 103 stones from Iran was determined by a polarisation microscope and infrared spectroscopy. The commonest components were whewellite (81.5%), weddellite (40.7%), apatite (69%) and ammonium acid urate (24.4%). Ectopic cossification in the nuclei was found in three renal calculi (2.9%). Twenty-five stones were from children, where one of the most frequent patterns was formed by both ammonium acid urate and calcium oxalate. This suggests that a high proportion of the children from Iran with urolithiasis have nutritional disorders.
mesh_terms: D000328:Adult; D002129:Calcium Oxalate / Q000032:analysis; D002130:Calcium Phosphates / Q000032:analysis; D002648:Child; D005260:Female; D006801:Humans; D006882:Hydroxyapatites / Q000032:analysis; D007492:Iran; D007669:Kidney Calculi / Q000378:metabolism*; D008274:Magnesium / Q000032:analysis; D017616:Magnesium Compounds; D008297:Male; D008859:Microscopy, Polarization; D008903:Minerals / Q000032:analysis*; D010710:Phosphates / Q000032:analysis; D013055:Spectrophotometry, Infrared; D000069877:Struvite; D014527:Uric Acid / Q000032:analysis; D001744:Urinary Bladder Calculi / Q000378:metabolism*
chemical_list: D002130:Calcium Phosphates; D006882:Hydroxyapatites; D017616:Magnesium Compounds; D008903:Minerals; D010710:Phosphates; C016189:whewellite; D002129:Calcium Oxalate; D014527:Uric Acid; C016188:weddellite; D000069877:Struvite; D008274:Magnesium; C494366:calcium phosphate, dibasic, dihydrate