title: Imaging of skull base lesions.
abstract: Skull base imaging requires a thorough knowledge of the complex anatomy of this region, including the numerous fissures and foramina and the major neurovascular structures that traverse them. Computed tomography (CT) and magnetic resonance imaging (MRI) play complementary roles in imaging of the skull base. MR is the preferred modality for evaluation of the soft tissues, the cranial nerves, and the medullary spaces of bone, while CT is preferred for demonstrating thin cortical bone structure. The anatomic location and origin of a lesion as well as the specific CT and MR findings can often narrow the differential diagnosis to a short list of possibilities. However, the primary role of the imaging specialist in evaluating the skull base is usually to define the extent of the lesion and determine its relationship to vital neurovascular structures. Technologic advances in imaging and radiation therapy, as well as surgical technique, have allowed for more aggressive approaches and improved outcomes, further emphasizing the importance of precise preoperative mapping of skull base lesions via imaging. Tumors arising from and affecting the cranial nerves at the skull base are considered here.
authors.affiliation: Department of Radiology, Harvard Medical School and Massachusetts Eye and Ear Infirmary; and Division of Neuroradiology, Massachusetts General Hospital, Boston, MA, USA. Electronic address: hillary.kelly@mgh.harvard.edu.
authors.forename: Hillary R
authors.initials: HR
authors.lastname: Kelly
authors.affiliation: Department of Radiology, Harvard Medical School and Massachusetts Eye and Ear Infirmary, Boston, MA, USA.
authors.forename: Hugh D
authors.initials: HD
authors.lastname: Curtin
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging; D019291:Skull Base / Q000000981:diagnostic imaging* / Q000293:injuries*; D019292:Skull Base Neoplasms / Q000000981:diagnostic imaging*; D015898:Tomography Scanners, X-Ray Computed
keywords: CT; MR imaging; anterior skull base; central skull base; skull base; skull base anatomy; skull base pathology; skull base tumors