title: MR imaging of cerebral extraventricular neurocytoma: a report of 9 cases.
abstract: Extraventricular neurocytoma is a rare entity, most frequently occurring in brain parenchyma outside the ventricular system. The purpose of this study was to characterize the MR imaging findings in a series of 9 patients with EVN verified by results of pathologic examination. All 9 EVNs were solitary and intracranially located. Eight lesions were well demarcated, and 3 showed intratumoral hemorrhage. The solid parts of 7 tumors were primarily isointense on T1-weighted images and heterogeneously enhanced on T1WI with contrast. Although cerebral EVNs can present a wide spectrum of appearances on MR, the imaging patterns appear to vary according to anatomic location and cellularity. Lesions in frontal or parietal lobes often present as well-demarcated large masses with cystic degeneration, hemorrhage, mild-to-moderate edema, and inhomogeneous enhancement. Moreover, the general isointensity of the solid parts of EVN on T1WI may be of some specificity.
authors.affiliation: Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, PR China.
authors.forename: K
authors.initials: K
authors.lastname: Liu
authors.forename: G
authors.initials: G
authors.lastname: Wen
authors.forename: X-F
authors.initials: XF
authors.lastname: Lv
authors.forename: Yan-Jia
authors.initials: YJ
authors.lastname: Deng
authors.forename: Yong-Jian
authors.initials: YJ
authors.lastname: Deng
authors.forename: G-Q
authors.initials: GQ
authors.lastname: Hou
authors.forename: X-L
authors.initials: XL
authors.lastname: Zhang
authors.forename: L-J
authors.initials: LJ
authors.lastname: Han
authors.forename: J-L
authors.initials: JL
authors.lastname: Ding
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000473:pathology*; D002551:Cerebral Ventricle Neoplasms / Q000473:pathology; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018306:Neurocytoma / Q000473:pathology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D055815:Young Adult