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Muscle Nerve. 2019 Jan;59(1):55-59. doi: 10.1002/mus.26322. Epub 2018 Nov 13.

Ultrasound of peripheral nerves in neuralgic amyotrophy.

Author information

1
Department of Neurology, Medical University of Vienna, Waehringer Guertel 18-20, 1090, Vienna, Austria.
2
Kempenhaeghe Center for Sleep Medicine, Heeze, The Netherlands.
3
Department of Neurology and Clinical Neurophysiology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands.

Abstract

INTRODUCTION:

Neuralgic amyotrophy (NA) can often be difficult to diagnose. Nerve ultrasound (US) is potentially useful, but it is operator-dependent, especially for small nerves.

METHODS:

Fifty-one consecutive patients with NA (mean duration 16 months) and 50 control subjects underwent US of the brachial plexus and major nerves of the upper extremity at predefined sites. We compared cross-sectional areas (CSAs) of affected and unaffected sides with controls and sides within patients.

RESULTS:

The median nerve and radial nerve at the level of the upper arm were enlarged on the affected sides compared with controls and the unaffected sides of patients. Enlargement was most pronounced for affected sides vs. controls (median 44%, radial 67%).

DISCUSSION:

NA patients showed increased CSAs, especially in the major nerves of the upper limb, even after longer disease duration. This could make US a useful adjunct in diagnosing NA. Muscle Nerve 59:55-59, 2019.

KEYWORDS:

Parsonage-Turner syndrome; brachial plexus; diagnosis; neuralgic amyotrophy; peripheral nerves; ultrasound

PMID:
30107038
DOI:
10.1002/mus.26322

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