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Updated: Jun 24, 2026

Primary Culture of Human Vestibular Schwannomas
Published on: July 20, 2014
Fluid-fluid level formation: a rare finding of extracranial head and neck schwannomas
H Kato1, M Kanematsu, K Mizuta
1Department of Radiology, Gifu University School of Medicine, Gifu, Japan. hkato@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.
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