Ripellino, P; Arányi, Z; van Alfen, N; Ventura, E; Peyer, A K; Cianfoni, A; Gobbi, C; Pedrick, E; Sneag, D B (2022). Imaging of Neuralgic Amyotrophy in the Acute Phase. Muscle & nerve, 66(6), pp. 709-714. John Wiley & Sons 10.1002/mus.27732
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Muscle_and_Nerve_-_2022_-_Ripellino_-_Imaging_of_Neuralgic_Amyotrophy_in_the_Acute_Phase.pdf - Accepted Version Available under License Publisher holds Copyright. Download (1MB) | Preview |
INTRODUCTION/AIMS
Hourglass-like constrictions (HGCs) occur in neuralgic amyotrophy (NA), but the earliest time at which they can be recognized by imaging is poorly understood. We aimed to determine the prevalence of abnormal imaging findings in the acute phase of NA.
METHODS
Magnetic resonance neurography (MRN) and high-resolution ultrasound (US) examinations were performed at 5 sites. The investigation included 39 patients with acute NA who underwent imaging within 31 days of symptom onset. Correlation between imaging and electromyography (EMG) findings was measured.
RESULTS
US was performed in 29 patients and MRN in 23; 16 patients underwent US only, 10 MRN only, and 13 had both. US and MRN showed nerve abnormalities within 1 month from NA onset in 90% of patients. HGCs were found in 74% (29/39) of the patients: 4 within 1 week, 8 within 2 weeks, 5 within 3 weeks, and 12 within 4 weeks. The earliest HGC on US was found within 12 hours, and on MRN within 3 days from symptom onset. MRN demonstrated a denervation edema pattern of affected muscles in 91% of the patients. The shortest time to observe an edema pattern on MRN was 8 days. EMG was performed in 30 patients and revealed fibrillation potentials in affected muscles in 22 (73%). A denervation edema pattern on MRN was significantly associated with the presence of HGCs both on MRN and US, and with fibrillation potentials on EMG.
DISCUSSION
In the early phase of NA, US and MRN are useful diagnostic techniques for demonstrating nerve abnormalities. This article is protected by copyright. All rights reserved.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic and Interventional Neuroradiology |
UniBE Contributor: |
Cianfoni, Alessandro |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
0148-639X |
Publisher: |
John Wiley & Sons |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
11 Oct 2022 13:34 |
Last Modified: |
12 Oct 2023 00:25 |
Publisher DOI: |
10.1002/mus.27732 |
PubMed ID: |
36214185 |
Uncontrolled Keywords: |
MR neurography Parsonage-Turner syndrome brachial plexus neuralgic amyotrophy neuromuscular ultrasound |
BORIS DOI: |
10.48350/173645 |
URI: |
https://boris.unibe.ch/id/eprint/173645 |
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