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Radiologic appearance of the dysembryoplastic neuroepithelial tumor
T Kuroiwa1, G K Bergey, M I Rothman
1Department of Radiology, University of Maryland Medical System, Baltimore 21201-1595, USA.
Radiology
|October 1, 1995
Summary
Computed tomographic (CT) and magnetic resonance (MR) imaging reveal characteristic features of dysembryoplastic neuroepithelial tumors (DNT). These imaging findings can help distinguish DNT from other gliomas.
Area of Science:
- Neuroradiology
- Neuro-oncology
- Medical Imaging
Background:
- Dysembryoplastic neuroepithelial tumor (DNT) is a rare epilepsy-associated tumor.
- Accurate diagnosis of DNT is crucial for appropriate patient management.
Purpose of the Study:
- To evaluate the computed tomographic (CT) and magnetic resonance (MR) imaging features of dysembryoplastic neuroepithelial tumor (DNT).
Main Methods:
- Retrospective review of 6 CT and 10 MR imaging studies in 10 patients with pathologically proven DNT.
- Analysis of imaging features including signal intensity, tumor margins, and associated bone remodeling.
Main Results:
- CT showed low-attenuation masses; MR imaging revealed decreased T1 and increased T2 signal intensity without peritumoral edema.
- Key MR features included gyriform configuration (100%), well-demarcated lobular margins (80%), and adjacent calvarial bone remodeling (60%).
- Bone remodeling was also noted on CT (67%).
Conclusions:
- While imaging alone may not definitively diagnose DNT, specific radiologic features can aid in differentiating it from other gliomas.
- CT and MR imaging findings provide valuable clues for the diagnosis of DNT.