title: Neuroradiological features of papillary glioneuronal tumor: a study of 8 cases.
abstract: OBJECTIVE
  The purpose of this study was to characterize the magnetic resonance imaging (MRI), and computed tomographic (CT) findings in a series of 8 patients with papillary glioneuronal tumor (PGNT).
  
  
  METHODS
  The routine MRI (n = 8), DWI (n = 7), and CT (n = 4) of 8 PGNTs verified by pathologic examination were reviewed. The location, internal architecture, calcification, attenuation value on CT; and signal features and degree of enhancement of the lesions on MRI were evaluated.
  
  
  RESULTS
  Papillary glioneuronal tumor showed relatively characteristic imaging features as well-demarcated masses with cystic degeneration, calcification, and inhomogeneous enhancement. Six of the 8 cases were located in the periventricular area. The solid part of the lesion was isointense (n = 5/8) or hypointense (n = 3/8) to gray matter on T1-weighted imaging. Diffusion-weighted imaging presented heterogeneous hypointensity and isointensity (n = 4/7) or homogeneous hypointensity (n = 3/7) in the solid part of the lesion.
  
  
  CONCLUSIONS
  The location adjacent to lateral ventricle, isointensity on T1-weighted imaging, and low signal on DWI may be of some specificity to PGNT.
authors.affiliation: From the *Department of Radiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, PR China; †Department of Radiology, and ‡Department of Neuropathology, Huashan Hospital, Fudan University, Shanghai, PR China.
authors.forename: WenLi
authors.initials: W
authors.lastname: Tan
authors.forename: WeiYuan
authors.initials: W
authors.lastname: Huang
authors.forename: Ji
authors.initials: J
authors.lastname: Xiong
authors.forename: JiaWei
authors.initials: J
authors.lastname: Pan
authors.forename: DaoYing
authors.initials: D
authors.lastname: Geng
authors.forename: Zhang
authors.initials: Z
authors.lastname: Jun
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000175:diagnosis*; D002291:Carcinoma, Papillary / Q000175:diagnosis*; D005260:Female; D018303:Ganglioglioma / Q000175:diagnosis*; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009457:Neuroglia / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult