title: [Sinonasal hemangiopericytomas].
abstract: OBJECTIVE
  The aim of this study was to report on the clinical, radiological and histological characteristics of hemangiopericytomas, and to discuss our experience with their treatment.
  
  
  METHODS
  The authors reexamined two recent cases of patients presenting with sinonasal hemangiopericytomas (semiology, CT and MRI results, treatment and follow-up).
  
  
  CONCLUSIONS
  There was substantial variability of hemangiopericytoma presentation depending on location. Hemangiopericytomas of the nose and paranasal sinuses are considered a distinct entity with a good prognosis. Treatment is based on endoscopic sinus surgery. The histological approach requires the use of immunohistochemistry. Recurrences vary in the literature depending on the initial resection quality. Metastases are rare.
authors.affiliation: Service d'ORL et de chirurgie cervicofaciale, faculté de médecine René-Descartes, université Paris-V, hôpital européen Georges-Pompidou, 20, rue Leblanc, 75015 Paris, France.
authors.forename: M
authors.initials: M
authors.lastname: Mimoun
authors.forename: C
authors.initials: C
authors.lastname: Badoual
authors.forename: T
authors.initials: T
authors.lastname: Meatchi
authors.forename: P
authors.initials: P
authors.lastname: Bonfils
mesh_terms: D003937:Diagnosis, Differential; D005260:Female; D006393:Hemangiopericytoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010255:Paranasal Sinus Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed