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HAND
Published in: HAND 4/2015

01-12-2015

Incidental signal changes in the extensor carpi ulnaris on MRI

Authors: Michael T. Kuntz, Stein J. Janssen, David Ring

Published in: HAND | Issue 4/2015

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Abstract

Background

Magnetic resonance imaging (MRI) commonly finds musculoskeletal abnormalities incidental to the reason for ordering the test. The purpose of this study was to determine if the prevalence of extensor carpi ulnaris (ECU) signal changes on MRI varies between patients undergoing upper extremity MRI for assessment of clinically suspected ECU tendinopathy and those undergoing upper extremity MRI for other indications. Our secondary null hypotheses were that the prevalence of ECU signal changes on MRI does not vary based on patient age or sex and that the prevalence of ECU signal changes on MRI does not vary among other indications for MRI.

Methods

We searched MRI reports of all patients undergoing MRI of the hand, wrist, or arm at our institution between 2001 and 2014 for signal changes in the ECU. The medical record was reviewed to determine the indication for the MRI and the presence of clinically suspected ECU tendinopathy.

Results

ECU signal changes (overall prevalence of 13 %) were more common in patients undergoing MRI for a working clinical diagnosis of ECU tendinopathy or ulnar-sided wrist pain compared to patients evaluated for nonspecific pain and other indications. Age was independently associated with ECU signal changes on MRI. MRI signal changes are uncommonly associated with symptomatic tendinopathy (low positive predictive value).

Conclusions

ECU signal changes on MRI are common and often asymptomatic.
Appendix
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Metadata
Title
Incidental signal changes in the extensor carpi ulnaris on MRI
Authors
Michael T. Kuntz
Stein J. Janssen
David Ring
Publication date
01-12-2015
Publisher
Springer US
Published in
HAND / Issue 4/2015
Print ISSN: 1558-9447
Electronic ISSN: 1558-9455
DOI
https://doi.org/10.1007/s11552-015-9764-9

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