Extra-axial subarachnoid ependymoma of the cerebral convexity.
A 29-year-old man had two episodes of seizures in 9 months. Following the first seizure he developed hemiparesis, which gradually progressed. Investigations revealed a large cerebral convexity mass lesion simulating a meningioma. During operation, a reddish-brown and well-defined tumor located in the subarachnoid space was encountered. Histopathological examination revealed a typical ependymoma. Extra-axial cerebral convexity ependymomas are extremely rare. The case is reported and a brief review of six similar cases reported in the literature is undertaken.
Department of Neurosurgery, Osaka City University Graduate School of Medicine, Osaka, Japan.
T
T
Goto
K
K
Ohata
N
N
Tsuyuguchi
T
T
Takami
M
M
Hara
D000328:Adult; D001932:Brain Neoplasms / Q000150:complications / Q000473:pathology* / Q000601:surgery; D004806:Ependymoma / Q000150:complications / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D012640:Seizures / Q000209:etiology; D013346:Subarachnoid Space / Q000473:pathology* / Q000601:surgery