title: [Intravesical hemangiopericytoma].
abstract: OBJECTIVE
  To report on a case of hemangiopericytoma of the urinary bladder mimicking a urothelial tumor.
  
  
  METHODS
  A case of hemangiopericytoma arising from the urinary bladder in a 78-year-old man is described. The initial symptoms included gross hematuria, and it was confused with a urothelial tumor. The difficulty in making the diagnosis in regard to the site of origin and histological findings are discussed. The literature is briefly reviewed.
  
  
  CONCLUSIONS
  Ultrasound and urographic evaluation showed an intravesical mass which was suspected to be a urothelial tumor. The patient was submitted to transurethral surgery. Histological analysis and immunohistochemical techniques demonstrated a hemangiopericytoma.
authors.affiliation: Servicio de Anatomía Patológica, Hospital General Gran Vía, Castellón, España.
authors.forename: R
authors.initials: R
authors.lastname: Lázaro Santander
authors.forename: J M
authors.initials: JM
authors.lastname: Castillo Gimeno
authors.forename: M D
authors.initials: MD
authors.lastname: García Prats
authors.forename: C
authors.initials: C
authors.lastname: André Gozalbo
authors.forename: J M
authors.initials: JM
authors.lastname: Vera Román
mesh_terms: D000368:Aged; D017809:Fatal Outcome; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D009336:Necrosis; D001743:Urinary Bladder / Q000473:pathology / Q000601:surgery; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D019459:Urothelium / Q000473:pathology / Q000601:surgery