Dysembryoplastic neuroepithelial tumor (DNET) associated with dysgenesis of the corpus callosum
Updates to Case Attributes
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The axial contrast-enhanced CT study shows a relatively well-demarcated cortically-based hypoattenuated lesion seen involving the lower posterior right frontal lobe, including the right inferior subcentral gyrus, without significant enhancement, mass effect or calcification. The study also shows features suggestive of corpus callosum agenesis.
Image 24 CT (C+ arterial phase) ( create )
Image 38 CT (C+ arterial phase) ( create )
Updates to Study Attributes
The MRI study shows a well-demarcated cortically-based lesion which appears with hyperintense signal on T2WI, with bubbly appearance, and hypointense in T1WI without significant enhancement or mass effect. Thin hyperintense rim is seen in the FLAIR study. Subtle scalloping of the overlying cranial bone is seen denoting chronicity. Features of partial agenesis of the corpus callosum are also noted, manifested by complete absenceabsence of the body and splenium of the CC, with relative preservation of the genu and rostrum. The lateral ventricles show typical "racing car" appearance on the axial plane.
The differential diagnosis is between DNET and Low grade glioma, the imaging characteristics and presentation of the patient go more with the former.
Image MRI (FLAIR) ( update )
Image MRI (T2) ( update )
Image MRI (T2) ( update )
Image MRI (T1 C+) ( update )
Image MRI (T1 C+) ( update )
Image 1 MRI (FLAIR) ( create )
Image 15 MRI (T2) ( create )
Image 15 MRI (T2) ( create )
Image 15 MRI (T2) ( create )
Image 19 MRI (FLAIR) ( create )
Image 19 MRI (T1 C+) ( create )
Image 19 MRI (T2) ( create )