Collision tumor of meningioma and malignant astrocytoma.

The authors report a 12-year-old boy who was presented with headache, nausea, vomiting and seizure. His magnetic resonance imaging showed 2 adjacent tumors in the region of the left ventricular trigone. The pathology of tumors reported collision tumors composed of meningioma and malignant astrocytoma.

The adjustable proGAV shunt: a prospective safety and reliability multicenter study.

Objective: To evaluate the reliability of the gravitation-assisted adjustable proGAV shunt system with a prospective multicenter study conducted in 10 German hospitals.

Methods: Enrollment for this observational study began in April 2005 and concluded in February 2006. The protocol required re-examinations 3 and 6 months postoperatively and fixed the endpoint of follow-up at 12 months after implantation.

Intraneural perineurioma of the VIIIth cranial nerve: case report.

Objective: The authors describe the clinical and pathological features of the second reported case of an intraneural perineurioma involving a major intracranial nerve and the first case of this entity involving the VIIIth cranial nerve.

Clinical Presentation: A 59-year-old woman presented with a long history of dizziness, tinnitus, hearing loss, and unstable gait. A magnetic resonance imaging scan revealed a small intrameatal lesion, which showed no clear progression from 2000 to 2006.

[Micro anatomy of the cavernous sinus].

Purpose: The surgical anatomy of the human cavernous sinus has been described by several authors. A clearer understanding of the anatomy of the cavernous sinus has resulted in an increased interest in surgical approaches to this region. Regarding the anatomical concept of the cavernous sinus previous descriptions should be revised.

Intracranial follicular dendritic cell sarcoma. Case report.

Intracranial occurrence of follicular dendritic cell (FDC) sarcoma, a rare tumor derived from dendritic cells of the lymphoid follicle, has not yet been described. Therefore, the case of a 53-year-old man presenting with an intracranial mass invading the clivus is reported. The diagnosis of FDC sarcoma was confirmed by immunohistochemical staining for dendritic cell markers, that is, CD21, CD23, and CD35.