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.
Case report. 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.