title: Pelvic hemangiopericytoma: the role of diffusion weighted imaging in targeting the biopsy site and in monitoring the tumour response to radiotherapy.
abstract: BACKGROUND
  Despite advances in imaging, the accurate characterization of soft tissue tumours remains a challenging task. Furthermore, the interpretation of post treatment changes and evaluation of tumour response to therapy is another complicating issue regarding soft tissue tumour imaging.
  
  
  METHODS
  Herein, a patient with a pelvic hemangiopericytoma, by whom different diagnostic imaging methods were used, is presented.
  
  
  CONCLUSIONS
  Diffusion weighted imaging (DWI) might provid useful information in guiding biopsy and enabled monitoring of the radiation therapy results.
authors.affiliation: Department of Radiology, University of Crete, Stavrakia, Heraklion, Crete, Greece.
authors.forename: Evangelos
authors.initials: E
authors.lastname: Perdikakis
authors.forename: Eelco
authors.initials: E
authors.lastname: de Bree
authors.forename: Elpida
authors.initials: E
authors.lastname: Giannikaki
authors.forename: Evangelia G
authors.initials: EG
authors.lastname: Chryssou
authors.forename: Christine
authors.initials: C
authors.lastname: Valatsou
authors.forename: Apostolos
authors.initials: A
authors.lastname: Karantanas