Bilateral intraneural perineurioma presenting as ulnar neuropathy at the elbow.
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.
Beekman
Roy
R
Department of Neurology, Academic Medical Centre, Utrecht, The Netherlands. r_beekman01@planet.nl
Slooff
Willem-Bart M
WB
Van Oosterhout
Matthijs F M
MF
Lammens
Martin
M
Van Den Berg
Leonard H
LH
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