MR findings of Dysembryoplastic Neuroepithelial Tumor.
10.3348/jkrs.1997.37.3.403
- Author:
Joo Yong SHIN
1
;
Jong Wun CHANG
;
Yang Gu JOO
Author Information
1. Department of Diagnostic Radiology, School of Medicine, Keimyung University.
- Publication Type:Original Article
- Keywords:
Brain neoplasms, MR
- MeSH:
Edema;
Epilepsy;
Ganglioglioma;
Glioma;
Humans;
Magnetic Resonance Imaging;
Male;
Neoplasms, Neuroepithelial*;
Retrospective Studies
- From:Journal of the Korean Radiological Society
1997;37(3):403-407
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: Dysembryoplastic neuroepithelial tumor (DNET) is a newly described, pathologically benign tumor arising within the supratentorial cortex. We reviewed the MR appearance of five patients with DNET, emphasizing the clinical and radiologic features. MATERIALS AND METHODS: MR images in the five patients (three male and two female) with a history of epileptic seizure and pathologically-proven DNET were retrospectively reviewed. We analyzed the location, configuration, signal intensity, contrast enhancement, vasogenic edema and calcifications of these tomors. RESULTS: The tumors were located mainly in the cortical to subcortical area with very little perifocal mass effect on MR imaging. They were essentially hypointense on T1-weighted imaging, and showed a hyperintense well circumscribed mass on T2-weighted imaging and a thick gyrus-like configuration was retained within the lesions. On contrast enhanced study, focal nodular enhancement was seen in one patient, and multifocal nodular enhancement in two. CONCLUSION: DNET is rare benign tumor resulting in often medically intractable epileptic seizure and shows a characteristic gyriform configuration, well-described lobular tumor margins and sometimes multifocal nodular enhancement. These radiologic features may aid in differentiating DNET from ganglioglioma and other gliomas.
