title: Intraneural perineurioma of the radial nerve visualized by 3.0 Tesla MRI.
abstract: A progressive radial neuropathy of unknown etiology despite 1.5T magnetic resonance imaging (MRI) and surgical exploration was identified as an intraneural perineurioma by a localized Tinel's sign, an enlarged radial nerve at the spiral groove by 3.0T MRI, and a fascicular biopsy. The distinction between the initial diagnoses of inflammatory, demyelinating polyneuropathy and perineurioma was made by immunohistochemistry and electron microscopy. A slowly progressing, localized mononeuropathy should include perineurioma in the differential diagnosis.
authors.affiliation: Mayo Clinic College of Medicine, Rochester, Minnesota, USA.
authors.forename: Doris
authors.initials: D
authors.lastname: Nguyen
authors.forename: P James
authors.initials: PJ
authors.lastname: Dyck
authors.forename: Jasper R
authors.initials: JR
authors.lastname: Daube
mesh_terms: D000328:Adult; D018450:Disease Progression; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D018317:Nerve Sheath Neoplasms / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D009431:Neural Conduction / Q000502:physiology; D010524:Peripheral Nervous System Neoplasms / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D020425:Radial Neuropathy / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery