A dysembryoplastic neuroepithelial tumor (DNT) is similar in behavior to the oligodendroglioma. Although it occurs in both adults and children, the average patient with this grade I, slow-growing brain tumor is under the age of twenty, and has a history of uncontrollable seizures of the partial complex type.

The DNT is most commonly located in a temporal or frontal lobe of the cerebrum.

A dysembryoplastic neuroepithelial tumor (DNT) is usually diagnosed following a long history of seizures. Surgery alone often results in long term control for this brain tumor. The benefit of radiotherapy is yet to be determined.