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KMID : 1103720150730060413
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Journal of the Korean Society of Radiology
2015 Volume.73 No. 6 p.413 ~ p.417
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Ancient Schwannoma at the Olfactory Groove Mimicking Meningioma: A Case Report
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Heo Young-Jin
Jeong Hae-Woong
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Abstract
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Schwannomas are benign slow-growing nerve sheath tumors, which can develop in any peripheral or central nerve that contains Schwann cells. Schwannomas located near the olfactory groove are extremely rare and radiological diagnosis can be difficult. Moreover, ancient schwannoma is an uncommon variant, and radiologic findings are rarely reported. Herein, we reported a surgically confirmed case of ancient schwannoma at the olfactory groove in a 44-year-old woman presenting with headache and visual disturbance. Brain magnetic resonance imaging (MRI) showed a solid and cystic extra-axial mass located in the subfrontal area mimicking an olfactory groove meningioma. Histopathologic diagnosis of ancient schwannoma was confirmed by immunohistochemical staining for S100, CD56, vimentin, and other markers. Furthermore, we described the clinical manifestations, MRI characteristics, and histopathologic findings of the case, and presented a review of related literature.
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KEYWORD
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Neoplasms, Neurilemmoma, Meningioma, Magnetic Resonance Imaging
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