title: Diagnostic difficulties with estimation of the cause of nephrolithiasis. Case presentation.
abstract: In some patients with recurrent urolithiasis we cannot identify the cause of stone formation. A 18 years old girl was evaluated for recurrent urolithiasis. Analysis of her stones demonstrated: calcium oxalate and 10% cystine; calcium phosphate and traces of magnesium and chloride, calcium phosphate and traces of potassium and calcium oxalate and ammonium-magnesium phosphate. We failed to make a correct etiological diagnosis despite of a very broad spectrum of laboratory investigations.
authors.affiliation: Nephrology, Renal Transplantation and Hypertension Department, Children's Memorial Health Institute, Warsaw, Poland.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Gadomska-Prokop
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Jobs
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D053040:Nephrolithiasis / Q000175:diagnosis* / Q000209:etiology*; D012008:Recurrence; D055815:Young Adult