AJDRAJNR - American Journal of Neuroradiology

Published ahead of print on March 11, 2009
doi: 10.3174/ajnr.A1511
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American Journal of Neuroradiology 30:1451-1453, August 2009
© 2009 American Society of Neuroradiology

Case Report
HEAD & NECK

Fluid-Fluid Level Formation: A Rare Finding of Extracranial Head and Neck Schwannomas

H. Katoa, M. Kanematsua,e, K. Mizutab, M. Aokib, K. Yamadac, H. Yamakawac, T. Iwamac and Y. Hirosed

a Department of Radiology, Gifu University School of Medicine, Gifu, Japan
b Department of Otolaryngology, Gifu University School of Medicine, Gifu, Japan
c Department of Neurosurgery, Gifu University School of Medicine, Gifu, Japan
d Department of Pathology, Gifu University School of Medicine, Gifu, Japan
e High-Level Imaging Diagnosis Center, Gifu University School of Medicine, Gifu, Japan

Please address correspondence to Hiroki Kato, MD, Department of Radiology, Gifu University School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan; e-mail: hkato{at}gifu-u.ac.jp

SUMMARY: We present 3 cases of extracranial head and neck schwannomas exhibiting fluid-fluid levels. In the described cases, CT and MR imaging showed predominantly cystic components, intermixed with cellular components. Histopathologic examinations of excised specimens revealed hemosiderin deposition, reflecting intratumoral hemorrhages, which was presumably a cause of fluid-fluid levels. Although fluid-fluid levels are nonspecific findings, schwannoma should be considered when radiologic images demonstrate marked cystic formation with fluid-fluid levels in extracranial head and neck tumors.






Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X