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Case Reports in Medicine
Volume 2011, Article ID 165954, 4 pages
http://dx.doi.org/10.1155/2011/165954
Case Report

Fourth Ventricular Schwannoma: Identical Clinicopathologic Features as Schwann Cell-Derived Schwannoma with Unique Etiopathologic Origins

1Division of Neurosurgery, Department of Surgery, Duke University Medical Center, P.O. Box 3807, Durham, NC 27710, USA
2Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA

Received 5 April 2011; Accepted 15 September 2011

Academic Editor: Mark E. Shaffrey

Copyright © 2011 Tiffany R. Hodges et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. To our knowledge, this is the sixth reported case in the literature of fourth ventricular schwannoma. The etiology and natural history of intraventricular schwannomas is not well understood. A thorough review of potential etiopathogenic mechanisms is provided in this case report. Case Description. A 69-year-old man presented with an incidentally found fourth ventricular tumor during an evaluation for generalized weakness, gait instability, and memory disturbance. Magnetic resonance imaging (MRI) revealed a heterogeneously enhancing lesion in the fourth ventricle. A suboccipital craniotomy was performed to resect the lesion. Histopathological examination confirmed the diagnosis of schwannoma (WHO grade I). Conclusions. Schwannomas should be considered in the differential diagnosis of intraventricular tumors. Although the embryologic origins may be different from nerve sheath-derived schwannomas, the histologic, clinical, and natural history appear identical and thus should be managed similarly.