dysembryoplastic neuroepithelial tumor
A benign glial-neuronal neoplasm. It is usually supratentorial, located, generally, in the cortex and occurs in children and young adults with a long-standing history of partial seizures. A histologic hallmark of this tumor is the 'specific glioneuronal element', characterized by columns, made up of bundles of axons, oriented perpendicularly to the cortical surface.B