title: Gliosarcoma: A rare primary CNS tumor. Presentation of two cases.
abstract: BACKGROUND
  Gliosarcoma is a very rare primary mixed tumor in the central nervous system, with a biphasic pattern consisting of glial and malignant mesenchymal elements. Its onset is between the fourth and sixth decade of life, and it has a male/female ratio of 1.8/1. Here we present two cases of Gliosarcoma treated in our department.
  
  
  CONCLUSIONS
  The monoclonal or biclonal origin of its biphasic nature is still subject to debate; hence the importance of its diagnosis and histogenesis.
  
  
  RESULTS
  Standard treatment consists in surgical resection of the tumor followed in some cases by external radiotherapy and chemotherapy.
authors.affiliation: CAPIO-Hospital General de Catalunya, Radiation Oncology, Pedro i Pons n° 1, 08195 Sant Cugat del Vallès, Barcelona, Spain.
authors.forename: José
authors.initials: J
authors.lastname: Pardo
authors.affiliation: CAPIO-Hospital General de Catalunya, Radiation Oncology, Pedro i Pons n° 1, 08195 Sant Cugat del Vallès, Barcelona, Spain.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Murcia
authors.affiliation: CAPIO-Hospital General de Catalunya, Pathology Department, Pedro i Pons n° 1, 08195 Sant Cugat del Vallès, Barcelona, Spain.
authors.forename: Felip
authors.initials: F
authors.lastname: García
authors.affiliation: CAPIO-Hospital General de Catalunya, Radiation Oncology, Pedro i Pons n° 1, 08195 Sant Cugat del Vallès, Barcelona, Spain.
authors.forename: Arnaldo
authors.initials: A
authors.lastname: Alvarado
keywords: Gliosarcoma; Two cases report