title: [Silica calculi: a case report].
abstract: A 66-year-old female visited our university hospital with the chief complaint of right lower abdominal pain in July, 1984. Kidney-ureter-bladder roentgenograms disclosed the right ureter stone and several left renal stones. She passed the right ureter stone composed of calcium oxalate. Thereafter, she passed small stones twice and sand stones twice until September, 1985. The stone analysis revealed two of them as silica. Although most patients with silica stones reported in Japan had a history of long-term medication of magnesium trisilicate, this patient had not taken this drug. Silica stones are rare and fifteen cases including the present case have been reported in Japan.
authors.affiliation: Department of Urology, Teikyo University Ichihara Hospital.
authors.forename: Y
authors.initials: Y
authors.lastname: Nishikawa
authors.forename: H
authors.initials: H
authors.lastname: Ito
authors.forename: H
authors.initials: H
authors.lastname: Fuse
authors.forename: J
authors.initials: J
authors.lastname: Shimazaki
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000737:chemistry* / Q000000981:diagnostic imaging; D008274:Magnesium / Q000009:adverse effects; D017633:Magnesium Silicates; D011859:Radiography; D012824:Silicic Acid / Q000009:adverse effects; D012822:Silicon Dioxide / Q000032:analysis*; D014514:Ureteral Calculi / Q000737:chemistry* / Q000000981:diagnostic imaging
chemical_list: D017633:Magnesium Silicates; D012824:Silicic Acid; D012822:Silicon Dioxide; C001671:magnesium trisilicate; D008274:Magnesium