A Case of Dysembryoplastic Neuroepithelial Tumor in an Adolescent Male

Dysembryoplastic neuroepithelial tumors (DNETs) are benign mixed glioneuronal neoplasms that frequently occur in children and young adults. We present the case of a 17-year-old male who arrived at the hospital following seizure-like activity. A magnetic resonance imaging (MRI) scan showed a 10 x 8 x 10 mm, oval-shaped, non-enhancing, well-defined mass within the right hippocampus. The patient underwent a transcortical approach via the middle temporal gyrus for resection of the mass; histopathological examination demonstrated the presence of round, uniform cells in an extensively myxoid background with diffuse reactivity to glial fibrillary acidic protein (GFAP). DNETs are considered benign, non-recurring lesions. Complete surgical resection is associated with a seizure-free outcome in 80% to 100% of cases.