title: Combining steady-state constructive interference and diffusion-weighted magnetic resonance imaging in the surgical treatment of epidermoid tumors.
abstract: We describe the usefulness of three-dimensional Fourier transformation-constructive interference in steady-state (CISS) imaging and diffusion-weighted imaging (DWI) in the pre- and postoperative magnetic resonance imaging evaluation of intracranial epidermoid tumors. Two surgically proven epidermoid tumors in the cerebellopontine (CP) angle were not identified in conventional T1- and T2-weighted images because of a signal intensity similar to that of cerebrospinal fluid (CSF). CISS images clearly demonstrated displacement of the cranial nerves and a shift caused by a lesion in the cistern, but the signal intensity of the tumor by CISS was not sufficiently different from that of CSF to demonstrate the tumor directly. Using DWI, the tumor in the cistern was shown clearly by its increased signal intensity. Together, CISS and DWI compensated for each other's disadvantages, and this combination was useful in guiding surgical treatment of epidermoid tumors in the CP cistern.
authors.affiliation: Department of Neurosurgery, Neurological Institute, Kyushu University, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Murakami
authors.forename: T
authors.initials: T
authors.lastname: Matsushima
authors.forename: H
authors.initials: H
authors.lastname: Kuba
authors.forename: K
authors.initials: K
authors.lastname: Ikezaki
authors.forename: T
authors.initials: T
authors.lastname: Morioka
authors.forename: F
authors.initials: F
authors.lastname: Mihara
authors.forename: T
authors.initials: T
authors.lastname: Inamura
authors.forename: M
authors.initials: M
authors.lastname: Fukui
mesh_terms: D000328:Adult; D002526:Cerebellar Diseases / Q000175:diagnosis / Q000601:surgery*; D002530:Cerebellopontine Angle / Q000473:pathology / Q000601:surgery; D004058:Diffusion; D004814:Epidermal Cyst / Q000175:diagnosis / Q000601:surgery*; D005260:Female; D006801:Humans; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging