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. The disease is dysembryoplastic neuroepithelial tumor (MONDO_0005505, a Monarch Disease Ontology entry). Also known as: DNET, DNT, dysembryoplastic neuroepithelial neoplasm, dysembryoplastic neuroepithelial tumor (morphologic abnormality), dysembryoplastic neuroepithelial tumour (morphologic abnormality).