title: Sylvian meningioma without dural attachment in an adult.
abstract: This paper presents a rare case of a sylvian meningioma in a 35-year-old male. The patient visited our hospital because of a 10-year history of simple partial seizures. Magnetic resonance imaging revealed a 3.5-cm, well-circumscribed, homogenously enhanced, circular mass without dural attachments in the left insular region. The tumor was not stained on angiogram. The tumor was located in the extra-axial space of the sylvian fissure without any dural attachment, and was strongly attached to the middle cerebral artery. The tumor was excised, and a histological diagnosis of a transitional meningioma without a malignancy was made. A Sylvian meningioma without dural attachment is quite rare, and a preoperative differentiation of this lesion is generally difficult. This paper discusses the characteristics and possible pathogenesis of meningiomas without a dural detachment.
authors.affiliation: Department of Neurosurgery, Brain Research Institute, and BK21 Project for Medical Sciences, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-gu, Seoul, Korea.
authors.forename: Jong Hee
authors.initials: JH
authors.lastname: Chang
authors.forename: Jeong-Ah
authors.initials: JA
authors.lastname: Kim
authors.forename: Jin Woo
authors.initials: JW
authors.lastname: Chang
authors.forename: Yong Gou
authors.initials: YG
authors.lastname: Park
authors.forename: Tai Seung
authors.initials: TS
authors.lastname: Kim
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D004388:Dura Mater / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008577:Meningeal Neoplasms / Q000098:blood supply / Q000473:pathology* / Q000601:surgery; D008579:Meningioma / Q000098:blood supply / Q000473:pathology* / Q000601:surgery; D020768:Middle Cerebral Artery / Q000473:pathology; D009364:Neoplasm Recurrence, Local / Q000601:surgery