title: CT and MRI Findings in a Rare Case of Renal Primitive Neuroectodermal Tumor.
abstract: BACKGROUND
  Primary renal primitive neuroectodermal tumor/extraskeletal Ewing's sarcoma (PNET/EES) is a very rare renal tumor.
  
  
  METHODS
  We report a case of primary renal PNET/EES of the kidney in an adult patient and describe its computed tomography and magnetic resonance imaging findings, including diffusion weighted images along with a review of the current medical literature.
  
  
  CONCLUSIONS
  Although very rare, a relatively large renal mass which shows very infiltrative growth pattern on CT and MR imaging and striking diffusion restriction should raise the suspicion of a renal primitive neuroectodermal tumor, in a young adult.
authors.affiliation: Department of Radiology, Ankara University, School of Medicine, Ankara, Turkey.
authors.forename: Zehra
authors.initials: Z
authors.lastname: Akkaya
authors.affiliation: Department of Radiology, Ankara University, School of Medicine, Ankara, Turkey.
authors.forename: Elif
authors.initials: E
authors.lastname: Peker
authors.affiliation: Department of Radiology, Ankara University, School of Medicine, Ankara, Turkey.
authors.forename: Basak
authors.initials: B
authors.lastname: Gulpinar
authors.affiliation: Department of Pathology, Ankara University, School of Medicine, Ankara, Turkey.
authors.forename: Hale
authors.initials: H
authors.lastname: Karadag
authors.affiliation: Department of Radiology, Ankara University, School of Medicine, Ankara, Turkey.
authors.forename: Ayse
authors.initials: A
authors.lastname: Erden
keywords: Diffusion Magnetic Resonance Imaging; Multidetector Computed Tomography; Neuroectodermal Tumors, Primitive, Peripheral