title: Urinary factors of kidney stone formation in patients with Crohn's disease.
abstract: An increased frequency of kidney stone formation is reported in patients with inflammatory bowel disease. In order to investigate its pathogenesis, the concentrations of factors known to enhance calcium oxalate stone formation (oxalate, calcium, uric acid) as well as of inhibitory factors for nephrolithiasis (magnesium, citrate) were determined in the urine of 86 patients with Crohn's disease and compared with those of 53 metabolically healthy controls. Six patients with Crohn's disease already had experienced calcium oxalate nephrolithiasis. Patients with Crohn's disease had significantly higher urinary oxalate and lower magnesium and citrate concentrations. Among all patients magnesium and citrate were significantly lower in those with a positive history of kidney stones. Our results demonstrate that the increased propensity for renal stone formation in patients with Crohn's disease is a result not only of increased urinary oxalate, but also of decreased urinary magnesium and citrate concentrations.
authors.affiliation: Abteilung Pädiatrie, Universität Erlangen.
authors.forename: H
authors.initials: H
authors.lastname: Böhles
authors.forename: O J
authors.initials: OJ
authors.lastname: Beifuss
authors.forename: U
authors.initials: U
authors.lastname: Brandl
authors.forename: J
authors.initials: J
authors.lastname: Pichl
authors.forename: Z
authors.initials: Z
authors.lastname: Akçetin
authors.forename: L
authors.initials: L
authors.lastname: Demling
mesh_terms: D000328:Adult; D002118:Calcium / Q000652:urine; D002951:Citrates / Q000652:urine; D019343:Citric Acid; D003424:Crohn Disease / Q000652:urine*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000652:urine*; D008274:Magnesium / Q000652:urine; D008297:Male; D010070:Oxalates / Q000652:urine; D019815:Oxalic Acid; D010710:Phosphates / Q000652:urine; D012307:Risk Factors; D014527:Uric Acid / Q000652:urine
chemical_list: D002951:Citrates; D010070:Oxalates; D010710:Phosphates; D014527:Uric Acid; D019343:Citric Acid; D019815:Oxalic Acid; D008274:Magnesium; D002118:Calcium