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Neuroradiological features of papillary glioneuronal tumor: a study of 8 cases
WenLi Tan1, WeiYuan Huang, Ji Xiong
1From 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.
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.
