title: Silica urolithiasis without magnesium trisilicate intake.
abstract: Two cases of silica stones, without previous oral intake of magnesium trisilicate, are reported. A 64-year-old Japanese woman had bilateral renal stones. Infrared spectrophotoscopy revealed that one of the fragments consisted of silicate and the others consisted of calcium oxalate. A 75-year-old woman had right renal stones. The composition of 1 stone was a mixture of silicate and unspecified matrices. Silicate urolithiasis may not necessarily be related to oral intake of silicate-containing antacids.
authors.affiliation: Department of Urology, Yamagata University School of Medicine, Yamagata, Japan.
authors.forename: O
authors.initials: O
authors.lastname: Ichiyanagi
authors.forename: I
authors.initials: I
authors.lastname: Sasagawa
authors.forename: Y
authors.initials: Y
authors.lastname: Adachi
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: Y
authors.initials: Y
authors.lastname: Kubota
authors.forename: T
authors.initials: T
authors.lastname: Nakada
mesh_terms: D000368:Aged; D000863:Antacids / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry / Q000000981:diagnostic imaging / Q000209:etiology* / Q000652:urine; D017633:Magnesium Silicates / Q000627:therapeutic use*; D008875:Middle Aged; D011859:Radiography; D012822:Silicon Dioxide / Q000009:adverse effects / Q000032:analysis* / Q000652:urine; D013055:Spectrophotometry, Infrared
chemical_list: D000863:Antacids; D017633:Magnesium Silicates; D012822:Silicon Dioxide; C001671:magnesium trisilicate