title: Lymphoplasmacyte-rich meningioma with atypical invasive nature.
abstract: A 12-year-old boy presented with a lymphoplasmacyte-rich (LPR) meningioma in the posterior fossa. The tumor was subtotally removed. Histological examination showed the tumor had invaded the normal brain tissue despite its benign grade in the World Health Organization classification. The Ki-67 staining index using MIB-1 monoclonal antibody was relatively high. (18)F-2-fluoro-2-deoxy-D-glucose positron emission tomography revealed high uptake in the tumor. These findings indicate the atypical nature of LPR meningioma.
authors.affiliation: Department of Neurosurgery, University of Tokyo Hospital, Tokyo, Japan.
authors.forename: Hidenori
authors.initials: H
authors.lastname: Nohara
authors.forename: Kazuhide
authors.initials: K
authors.lastname: Furuya
authors.forename: Nobutaka
authors.initials: N
authors.lastname: Kawahara
authors.forename: Akira
authors.initials: A
authors.lastname: Iijima
authors.forename: Kyoko
authors.initials: K
authors.lastname: Yako
authors.forename: Junji
authors.initials: J
authors.lastname: Shibahara
authors.forename: Takaaki
authors.initials: T
authors.lastname: Kirino
mesh_terms: D000293:Adolescent; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000473:pathology*; D008579:Meningioma / Q000473:pathology*; D009361:Neoplasm Invasiveness; D010950:Plasma Cells