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ISRN Neurology
Volume 2012 (2012), Article ID 491892, 6 pages
http://dx.doi.org/10.5402/2012/491892
Research Article

Diagnostic Value of Ultrasonography and Magnetic Resonance Imaging in Ulnar Neuropathy at the Elbow

1Neuroscience Research Center, Tabriz University of Medical Sciences, Tabriz 51666-14756, Iran
2Department of Radiology, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran
3Department of Community Medicine, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran
4Medical Philosophy and History Research Center, Tabriz University of Medical Sciences, Tabriz 51656-65811, Iran

Received 8 May 2012; Accepted 30 May 2012

Academic Editors: H. Aldskogius, C. Angelini, and D. Munoz

Copyright © 2012 Hormoz Ayromlou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Aim. To evaluate the diagnostic value of ultrasonography and magnetic resonance imaging (MRI) in patients with ulnar neuropathy at the elbow (UNE). Methods. We prospectively performed electrodiagnostic, ultrasonographic, and MRI studies in UNE patients and healthy controls. Three cross-sectional area (CSA) measurements of the ulnar nerve at multiple levels along the arm and maximum CSA(-max) were recorded. Results. The ulnar nerve CSA measurements were different between the UNE severity grades ( 𝑃 < 0 . 0 5 ). CSA-max had the greatest sensitivity (93%) and specificity (68%). Moreover, CSA-max 1 0  mm2 defined the severe UNE cases (sensitivity/specificity: 82%/72%). In MRI, ulnar nerve hyperintensity had the greatest sensitivity (90%) and specificity (80%). Conclusion. Ultrasonography using CSA-max is sensitive and specific in UNE diagnosis and discriminating the severe UNE cases. Furthermore, MRI particularly targeting at increased signal of the ulnar nerve can be a useful diagnostic test of UNE.