Role of MRI in the diagnosis of dysembryoplastic neuroepithelial
tumors: a review of two cases

Zineb Abbad El Andaloussi1*, Ali Laanait1, Hayat Bakali1, A. Merzem1, H. Belgadir1,
N.Moussali1, N. Elbenna1.
Page No. 28-38

Dysembryoplastic neuroepithelial tumors (DNET) are benign brain tumors clinically revealed by
partial seizures occurring in young patients from 20 years of age, with normal neurological
examination. Imaging contributes to the diagnosis, it is a supratentorial cortical lesion, without
mass effect or peri-lesional edema. The temporal localization is the most frequent followed by the
frontal localization more rarely parietal and occipital. generally stable tumor. Surgery is the only
treatment for DNET, it allows the control of epilepsy in 85%., But the confirmation remains
histological. We report two cases of DNET, in two patients aged 17 and 14, with epilepsy resistant
to medical treatment, without neurological deficit on clinical examination, it results in MRI by a
temporal cortical lesion in the first case and parietal in the first case. the second, without mass
effect or peri-lesional edema.
Keywords : epilepsy, MRI, DNET.