Contrast-enhanced CT
Proton DensityMRI
T1W MRI w/GadoliniumDysembryoplastic Neuroepithelial Tumor (DNET)
Dysembryoplastic Neuroepithelial Tumors (DNET) is a benign tumor arising from the cortical or deep gray matter. It is occasionally cystic and is most commonly located in the temporal (62%) and frontal lobes (31%). There is only one documented case of malignant transformation. The classic patient presentation is an individual less than 20 years old with medically refractory partial seizures without neurological deficit.
Imaging features:
CT - hypoattenuating mass that may occasionally have areas of calcifications. Remodeling of the adjacent inner table of the skull may occur.
MRI - cortical masses that are hypointense on T1-weighted images and hyperintense on T2-weighted images without surrounding vasogenic edema. DNETs tend to show a multicystic appearance more commonly than gangliogliomas.
Ganglioglioma
Oligodendroglioma
or other low-grade neoplasms
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