title: Preoperative radiological evaluation and surgical strategy for the preservation of visual acuity in patients with skull base meningiomas--two case reports.
abstract: Two women aged 48 and 73 years, respectively, presented with unilateral visual disturbance. On admission, magnetic resonance imaging (MRI) showed an extraaxial mass in the parasellar region. Contrast-enhanced fast imaging with steady-state acquisition (CE-FIESTA) showed that the optic nerves were compressed and encased by the tumors. At an early stage of surgery, we performed decompression of the optic nerves to avoid optic nerve injury. Both the patients were relieved of visual disturbances without any postoperative neurological deficit. In conclusion, CE-FIESTA is a useful diagnostic tool for preoperative evaluation of the optic nerves in patients with skull base meningiomas. Decompression of the optic nerves should be performed at an early stage of surgery in meningioma patients presenting with visual disturbance.
authors.affiliation: Department of Neurosurgery, University of Occupational and Environmental Health, Japan. Yahatanishi-ku, Kitakyushu 807-8555, Japan.
authors.forename: Junkoh
authors.initials: J
authors.lastname: Yamvamoto
authors.forename: Mayu
authors.initials: M
authors.lastname: Takahashi
authors.forename: Yoshiteru
authors.initials: Y
authors.lastname: Nakano
authors.forename: Takeshi
authors.initials: T
authors.lastname: Saito
authors.forename: Takehiro
authors.initials: T
authors.lastname: Kitagawa
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Ueta
authors.forename: Ryo
authors.initials: R
authors.lastname: Miyaoka
authors.forename: Shigeru
authors.initials: S
authors.lastname: Nishizawa
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008579:Meningioma / Q000175:diagnosis* / Q000601:surgery*; D008875:Middle Aged; D057234:Preoperative Period; D019292:Skull Base Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D014792:Visual Acuity