J Korean Soc Radiol.  2015 Dec;73(6):413-417. 10.3348/jksr.2015.73.6.413.

Ancient Schwannoma at the Olfactory Groove Mimicking Meningioma: A Case Report

Affiliations
  • 1Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, Korea. hwjeong2000@lycos.co.kr

Abstract

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.


MeSH Terms

Adult
Brain
Diagnosis
Female
Headache
Humans
Magnetic Resonance Imaging
Meningioma*
Nerve Sheath Neoplasms
Neurilemmoma*
Schwann Cells
Vimentin
Vimentin
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