title: Bilateral intraneural perineurioma presenting as ulnar neuropathy at the elbow.
abstract: We describe a 36-year-old woman with progressive bilateral ulnar neuropathy. Sonographic and magnetic resonance imaging studies revealed extensive focal ulnar nerve enlargement at the elbow. Histological studies gave evidence of an intraneural perineurioma. Because intraneural perineurioma usually appears as a single mass lesion at sites other than typical entrapment sites, this mode of presentation is unusual. We discuss the nature of this benign tumor and the differential diagnosis of nerve enlargement. Knowledge of possible causes of nerve thickening is crucial when performing imaging in patients with neuropathies.
authors.affiliation: Department of Neurology, Academic Medical Centre, Utrecht, The Netherlands. r_beekman01@planet.nl
authors.forename: Roy
authors.initials: R
authors.lastname: Beekman
authors.forename: Willem-Bart M
authors.initials: WB
authors.lastname: Slooff
authors.forename: Matthijs F M
authors.initials: MF
authors.lastname: Van Oosterhout
authors.forename: Martin
authors.initials: M
authors.lastname: Lammens
authors.forename: Leonard H
authors.initials: LH
authors.lastname: Van Den Berg
mesh_terms: D000200:Action Potentials; D000328:Adult; D003937:Diagnosis, Differential; D004550:Elbow; D004568:Electrodiagnosis; D004576:Electromyography; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D018317:Nerve Sheath Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D010524:Peripheral Nervous System Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000473:pathology; D014459:Ulnar Nerve / Q000473:pathology; D020424:Ulnar Neuropathies / Q000209:etiology*; D014463:Ultrasonography