Supratentorial extraventricular WHO grade III (anaplastic) ependymoma 17 years after total removal of WHO grade II ependymoma of the fourth ventricle

Abstract

We report a WHO grade III ependymoma of the supratentorial interhemispheric fissure and grew to form a large mass with anaplastic transformation without local recurrence 17 years after the total removal of a fourth ventricular WHO grade II ependymoma. We emphasize the necessity of long-term follow-up, even in benign ependymomas.

Keywords:

• Anaplastic transformation
• CSF seeding
• interhemispheric fissure
• supratentorial ependymoma

Disclosure statement

The authors report no conflicts of interest. The authors alone are responsible for the content and writing of this article.