title: Imaging of the cerebellopontine angle.
abstract: Pathologic processes within the cerebellopontine angle (CPA) may present because of mass effect on local structures or on the pons or cerebellum. MR imaging is superior to CT for evaluation of the complete extent of a CPA mass and for characterization of its likely nature. MR is also superior to CT for the detection of leptomeningeal processes. Arriving at a short list of differential diagnoses requires a methodical approach, keeping in mind the location, signal, diffusion, and enhancement characteristics of the lesions. Advanced MR imaging techniques, such as magnetic resonance spectroscopy, are not usually needed routinely but may aid in the differential diagnosis when presented with atypical masses.
authors.affiliation: Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA. magge.lakshmi@radiology.ucsf.edu
authors.forename: Magge
authors.initials: M
authors.lastname: Lakshmi
authors.forename: Christine M
authors.initials: CM
authors.lastname: Glastonbury
mesh_terms: D000328:Adult; D000368:Aged; D016080:Arachnoid Cysts / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D001927:Brain Diseases / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000473:pathology*; D001932:Brain Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D002530:Cerebellopontine Angle / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000473:pathology*; D020214:Cerebrovascular Trauma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D003937:Diagnosis, Differential; D004814:Epidermal Cyst / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D005260:Female; D006801:Humans; D008067:Lipoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods; D008579:Meningioma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D008875:Middle Aged; D009362:Neoplasm Metastasis / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D009442:Neurilemmoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods; D020306:Tuberculosis, Central Nervous System / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology