title: [Orbital hemangiopericytoma: a case with involvement of the intraconal space].
abstract: OBJECTIVE
  We report a case of orbital hemangiopericytoma, in a 14 year-old boy. Neuroradiological findings, including those of computerized tomography (CT), magnetic resonance imaging (MRI), and ultrasonography are detailed.
  
  
  CONCLUSIONS
  Diagnostic imaging showed a well-circumscribed and solid mass with an intraconal location. The tumor was grossly purple, richly vascularized and encapsulated. The histological study revealed a hemangiopericytoma of borderline grade with hypercellularity and moderate number of mitotic figures. We emphasize the rarity of the orbital hemangiopericytoma specially when it is located within the muscle cone.
authors.affiliation: Servicio de Oftalmología, Hospital Materno Infantil, Las Palmas de Gran Canaria, España.
authors.forename: M E
authors.initials: ME
authors.lastname: Cabrera Vargas
authors.forename: J
authors.initials: J
authors.lastname: Pérez Alvarez
authors.forename: C
authors.initials: C
authors.lastname: Díaz Arriaga
authors.forename: D
authors.initials: D
authors.lastname: Marrero Saavedra
authors.forename: D
authors.initials: D
authors.lastname: Pérez Silguero
authors.forename: M
authors.initials: M
authors.lastname: Andújar Sánchez
mesh_terms: D000293:Adolescent; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D009918:Orbital Neoplasms / Q000175:diagnosis* / Q000601:surgery