15 years, Female, Reason: evaluate position of electrodes. Examination is limited to sequences for operative planning and intraoperative navigation. Nodular subependymoma heterotopia and findings suspicious for left mesial temporal sclerosis are again seen. Placement of three depth electrodes via left parieto-occipital burr holes is seen which terminate in the left medial temporal lobe just anterior to the left hippocampal head as well as within the subependymal gray matter heterotopia along the posterior body on the left lateral ventricle and left periatrial regions. There is also a subdural grid placed along the left anterior temporal convexity via a left temporal burr hole with small adjacent extra-axial collection. No large hemorrhage or intracranial mass effect is evident. No hydrocephalus.
Examination for operative planning and intraoperative navigation demonstrating multiple left hemicranial depth electrodes in the left medial temporal lobe and within the left nodular subependymal heterotopia as well as subdural grid along the left temporal convexity.