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American Journal of Neuroradiology 23:1493-1496, October 2002
© 2002 American Society of Neuroradiology

Case Report
HEAD AND NECK

Intracanalicular Meningioma Mimicking Vestibular Schwannoma

Katsuyuki Asaokaa, David M. Barrsb, John H. Sampsonc, John T. McElveen, Jrb,d, Debara L. Tuccid and Takanori Fukushimaa

a the Carolina Neuroscience Institute for Skull Base Surgery, Raleigh
b the Carolina Ear Research Institute, Raleigh
c the Division of Neurosurgery, Duke University Medical Center, Durham, NC
d the Division of Otolaryngology, Duke University Medical Center, Durham, NC

Address reprint requests to Katsuyuki Asaoka, MD, PhD, Carolina Neuroscience Institute for Skull Base Surgery, 4030 Wake Forest Road, Suite 115, Raleigh, NC 27609

Summary: Three cases of intracanalicular meningioma mimicking vestibular schwannoma are presented. In each case, a contrast-enhancing mass filling the internal auditory canal was identified on MR images and was originally diagnosed as a vestibular schwannoma. Although it is difficult to differentiate definitively between these lesions preoperatively, imaging findings inconsistent with a diagnosis of vestibular schwannoma can be identified. Preoperative identification of intracanalicular meningiomas permits alterations in surgical planning that allow for the more complete resection of these rare tumors.




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