title: Characteristic plain radiographic and intravenous urographic findings of bladder calculi formed over a hair nidus: a case report.
abstract: We present the characteristic plain radiographic and intravenous urographic (IVU) findings of calculus formed over a hair. A 66-year-old man who had been quadriplegic for 40 years because of vertebral injury was admitted for further evaluation of frequent urinary tract infection. Plain radiography showed a linear, serpiginous calcification in the lower abdomen, and IVU revealed a round filling defect with linear radiopacity in the bladder, suggesting calculus. The gross appearance of the stone after extraction demonstrated that calcification had formed over a hair.
authors.affiliation: Department of Radiology, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Lee
authors.forename: S H
authors.initials: SH
authors.lastname: Kim
mesh_terms: D000368:Aged; D006197:Hair; D006801:Humans; D008297:Male; D011782:Quadriplegia / Q000150:complications; D001744:Urinary Bladder Calculi / Q000000981:diagnostic imaging*; D014567:Urography