title: Safe removal of glioblastoma near the angular gyrus by awake surgery preserving calculation ability--case report.
abstract: A 67-year-old patient presented with progressive agraphia, alexia, and impaired ability to calculate persisting for 4 weeks. He showed preserved ability to do single-digit addition and subtraction. Magnetic resonance imaging demonstrated a tumor in the left parietal lobe. A malignant glioma was suspected, and awake craniotomy was performed to remove the tumor with functional cortical mapping to determine the cortices involved in calculation and language. His calculation ability was mapped on the angular gyrus, and partial resection of the tumor was achieved without deterioration of that ability. The histological diagnosis was glioblastoma multiforme. The patient's calculation ability improved dramatically after the operation.
authors.affiliation: Department of Neurosurgery, University of Toyama, Japan. kuri3312@ms.toyama-mpu.ac.jp
authors.forename: Masanori
authors.initials: M
authors.lastname: Kurimoto
authors.forename: Takashi
authors.initials: T
authors.lastname: Asahi
authors.forename: Takashi
authors.initials: T
authors.lastname: Shibata
authors.forename: Chiaki
authors.initials: C
authors.lastname: Takahashi
authors.forename: Shoichi
authors.initials: S
authors.lastname: Nagai
authors.forename: Nakamasa
authors.initials: N
authors.lastname: Hayashi
authors.forename: Mie
authors.initials: M
authors.lastname: Matsui
authors.forename: Shunro
authors.initials: S
authors.lastname: Endo
mesh_terms: D000368:Aged; D001931:Brain Mapping; D001932:Brain Neoplasms / Q000601:surgery*; D005909:Glioblastoma / Q000601:surgery*; D006801:Humans; D008297:Male; D008606:Mental Processes / Q000502:physiology; D010296:Parietal Lobe / Q000503:physiopathology* / Q000601:surgery*