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J Korean Neurosurg Soc. 2013 Oct;54(4):340-343. English. Case Report.
Lee S , Park SH , Chung CK .
Department of Neurosurgery, Seoul National University Hospital, Seoul, Korea.
Neuroscience Research Institute, Seoul National University Medical Research Center, Seoul, Korea.
Clinical Research Institute, Seoul National University Hospital, Seoul, Korea.
Department of Pathology, Seoul National University Hospital, Seoul, Korea.

Intracerebral schwannomas are rare and there have been none reported in Korea. We present the case of a 25-year-old man with newly developed right-side weakness and recent seizure aggravation. His seizures started approximately 9 years prior to admission. At that time, a 1 cm diameter intra-axial enhancing mass at the left precentral gyrus was found on magnetic resonance image (MRI). After 9 years of observation and treatment with antiepileptic medication, an MRI taken due to symptom aggravation revealed peri-tumoral cyst formation with tumor enlargement. The tumor was surgically removed. Subsequently, right-side weakness diminished and there was good seizure control. Pathologic diagnosis was schwannoma. Schwannoma is a very rare tumor and there are no pathognomonic findings on radiologic images; thus, it is challenging to make a correct diagnosis. However, considering the natural course and excellent prognosis after surgical treatment of this kind of intra-axial mass with benign features, early surgery for diagnosis and proper treatment is highly recommended.

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