Histopathology proved: supratentorial ependymoma.

Supratentorial ependymomas are rare glial tumors that are derived from the ependymal cells lining the ventricles.

Radiological features of these tumors include heterogeneous intraparenchymal masses with calcification (50%), cystic components (50%), solid enhancing components, and surrounding edema. 

Although they can be located anywhere in the hemispheres, they seem to have a predilection for the frontal and parietal lobes.

Supratentorial ependymomas affect primarily children and adolescents, but also adults to a lesser degree (as presented in this case).