title: Giant bladder stone in a male patient: A case report.
abstract: BACKGROUND
  In recent years, bladder stones are increasing in China. However, a giant bladder stone is rarely found nowadays.
  
  
  METHODS
  A case of a 54-year-old man who presented with a >9-year history of urinary frequency and urgency and macrohematuria for the past 3 days, was examined by ultrasound scan, kidney-ureter-bladder x-ray, and computed tomography. Then, the patient received a cystolithotomy.
  
  
  RESULTS
  His suprapubic area was hard when palpated. An ultrasound scan showed hydronephrosis of both kidneys and expanded ureters. A kidney-ureter-bladder x-ray showed a large stone within the bladder, and computed tomography revealed that the stone occupied most of the bladder. A large bladder stone composed of magnesium ammonium phosphate, weighing 1048 g, and measuring 13.3*8.0*9.7cm in size was removed.
  
  
  CONCLUSIONS
  This rare case is, to the best of our knowledge, the largest bladder stone case reported to date in China. For patients with only Lower urinary tract symptoms, bladder stone should be taken into consideration when other signs occur, such as recurrent urinary tract infection and hematuria.
authors.affiliation: Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University Department of Urology, Tianjin Nankai Hospital, Nankai District, Tianjin 300100, China.
authors.forename: Chengquan
authors.initials: C
authors.lastname: Ma
authors.forename: Bingxin
authors.initials: B
authors.lastname: Lu
authors.forename: ErLin
authors.initials: E
authors.lastname: Sun
mesh_terms: D002681:China; D003430:Cross-Sectional Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D000069877:Struvite / Q000032:analysis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D001744:Urinary Bladder Calculi / Q000737:chemistry / Q000000981:diagnostic imaging* / Q000453:epidemiology / Q000601:surgery
chemical_list: D000069877:Struvite