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Case Reports in Medicine
Volume 2013 (2013), Article ID 563019, 4 pages
http://dx.doi.org/10.1155/2013/563019
Case Report

Parapharyngeal Neck Schwannomas with Unusual Vascular Displacement

Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, MO, USA

Received 3 April 2013; Accepted 22 July 2013

Academic Editor: David W. Eisele

Copyright © 2013 Kiran Sargar. 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

This case report illustrates two unusual cases of parapharyngeal schwannomas mimicking carotid body tumors in terms of characteristic vascular displacement. Carotid body tumors classically cause splaying of internal and external carotid arteries demonstrating the Lyre sign on imaging. Also interestingly, both of these cases were seen in younger ages and include cervical sympathetic chain schwannoma and vagal schwannoma. However, these schwannomas revealed hypovascularity on imaging studies allowing differentiation from hypervascular carotid body tumors. Preoperative distinction between carotid body tumors and schwannomas is very important.