Role of MRI in the Diagnosis of Dysembryoplastic Neuroepithelial Tumours (DNET): Two Case Reports
Zineb Abbad El Andaloussi, Ali Laanait, Hind Arbouni, Aicha Merzem, Hasna Belgadir, Nadia Moussali, Naima Elbenna
Asian Journal of Case Reports in Surgery · pp. 343–348 · Published 24 May 2021
Abstract
Aims: Show the value of MRI in the diagnosis of DNET. Presentation of Case: We report two cases of DNET, in two patients aged 17 and 14 years, with epilepsy resistant to medical treatment, with no neurological deficit on clinical examination. On MRI, the first case shows a temporal cortical lesion and the second a parietal lesion, with no mass effect or peri lesional edema. Discussion and Conclusion: Dysembryoplastic neuroepithelial tumors (DNET) are benign brain tumors clinically revealed by partial seizures occurring in young patients under 20 years of age, with normal neurological examination. Imaging contributes to the diagnosis, it is a cortical sus-tentorial lesion, without mass effect or peri lesional edema. The temporal location is the most frequent, followed by the frontal location more rarely parietal and occipital. It is a generally stable tumor. Surgery is the only treatment for DNET, it allows epilepsy to be controlled in 85%, but confirmation remains histological.
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