title: [Analysis of calculi by infrared spectroscopy in children from the Moroccan mid-Atlas region].
abstract: Calculi from 45 Moroccan children aged between 2 and 15 years underwent morphological and infrared spectrometric analysis. The stones were three times more frequent in males than females (M/F = 3.09). Whewellite was the main component in 51.1% of cases and in 44.4% of stone nuclei, wheddellite in 8.9% of stones and nuclei, carbapatite in 6.7% of stones and 8.9% of nuclei, struvite in 15.6% of stones and 11.1% of nuclei. Ammonium hydrogen urate and uric acid were predominant respectively in 8.9% and 6.7% of stones and in 15.6% and 11.1% of nuclei. In addition to whewellite, struvite and ammonium hydrogen urate were the main components of bladder stones from both sexes. With respect to their calculi, whewellite was present in 84.4% of cases and wheddellite in 26.7%. Purines were present in 46% of calculi, especially as ammonium urate (28.9%) and uric acid (15.6%). Calcium phosphates as the main components were infrequent. In contrast, they were frequently identified in urinary calculi from children, respectively 64.4% and 40% for carbapatite and amorphous carbonated calcium phosphate.
authors.affiliation: Laboratoire de spectrochimie appliquée et environnement, faculté des sciences et techniques, université Cadi-Ayyad, Beni-Mellal, Maroc.
authors.forename: A
authors.initials: A
authors.lastname: Oussama
authors.forename: F
authors.initials: F
authors.lastname: Kzaiber
authors.forename: B
authors.initials: B
authors.lastname: Mernari
authors.forename: A
authors.initials: A
authors.lastname: Semmoud
authors.forename: M
authors.initials: M
authors.lastname: Daudon
mesh_terms: D000293:Adolescent; D002129:Calcium Oxalate / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry*; D008297:Male; D009018:Morocco; D011687:Purines / Q000032:analysis*; D000644:Quaternary Ammonium Compounds / Q000032:analysis; D012737:Sex Factors; D019265:Spectroscopy, Near-Infrared; D014527:Uric Acid / Q000032:analysis*
chemical_list: D011687:Purines; D000644:Quaternary Ammonium Compounds; C016189:whewellite; D002129:Calcium Oxalate; D014527:Uric Acid