Fouad Gellad

Magnetic resonance imaging of limbic encephalitis.

SummaryIn two patients with limbic encephalitis serial magnetic resonance (MR) imaging showed evolution of abnormal high-signal intensity in both hippocampal formations on T2-weighted images.

Bleeding Patterns in Ruptured Posterior Fossa Aneurysms: A Ct Study

Computed tomography of the brains in 20 patients with acute rupture of posterior fossa aneurysms was reviewed and analyzed retrospectively. Findings were compared with those from 44 cases described in the literature and with the findings in ruptured supratentorial aneurysms. Extravasated blood was observed in 19 of 20 patients (95%); intraventricular hemorrhage (IVH) in 17 of 20 (85%); and subarachnoid hemorrhage (SAH) in 13 of 20 (65%). These values were significantly higher than those previously reported and suggest that, during the acute phase of rupture, extravasated blood may be detected with the same frequency in either infratentorial or supratentorial ruptured aneurysms. Subarachnoid hemorrhage was accompanied by IVH, prominent in the fourth ventricle and without intraparenchymal hematoma, in 11 patients (55%). This pattern is highly suggestive of ruptured posterior fossa aneurysms. Intraventricular hemorrhage without SAH was noted in five patients (25%) and specifically represented ruptured posterior inferior cerebellar artery aneurysms. Subarachnoid hemorrhage without IVH was noted in only two patients (10%).

Osteoblastoma of the temporal bone: CT findings.

A case of recurrent benign osteoblastoma of the temporal bone is presented with discussion of the clinical, radiological, and pathological findings. Previously reported cases of osteoblastoma of the temporal bone are briefly reviewed.

High signal intensity of both putamina in patients with HIV infection.

SummaryWe report two patients with HIV infection whose MR imaging showed abnormal high signal intensity confined to both putamina on T2-weighted spin echo (SE) images. We assume that they may represent the early manifestations of HIV encephalitis.

Corpus callosotomy for refractory seizures in a patient with cortical heterotopia: case report

Heterotopia of the cerebral cortex, a disorder of neuronal migration, may be associated with medically intractable seizures. We report on a patient with bihemispheric cortical heterotopia who had medically intractable atonic seizures that were successfully treated by corpus callosotomy. The clinical and radiographic aspects of cortical heterotopia and the surgical management of seizures associated with heterotopia are discussed.

Magnetic resonance imaging of a high cervical intradural lipoma

A case of intradural spinal lipoma, rarely seen in the high cervical region, is described. Extension into the posterior fossa is not infrequent with these rare tumors. Magnetic resonance imaging clearly showed the longitudinal dimension of the tumor as well as the infiltrative extension into the spinal cord without any invasive procedure.