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C-1374 - MRI evaluation of Muscle denervation - An uncommon cause of shoulder pain.

A. Snoddon, P. P. Nagtode, N. MENON, C. Nel; Mid yorkshire Hospitals NHS trust , Wakefield/UK Type: Educational Exhibit
Area of Interests: Musculoskeletal soft tissue, Extremities, Neuroradiology peripheral nerve
Imaging Technique: MR
Procedure: Diagnostic procedure
Special Focus: Edema
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Learning objectives: To demonstrate features of denervation around the shoulder girdle and review potential causes of this one may identify on MRI. To highlight some anatomical features that may prompt reporting radiologists to review for particular causes of denervation of the muscles of the shoulder girdle.

Background: Denervation of the muscles of the shoulder girdle is an important but uncommon cause of shoulder pain. Previously, diagnosis of muscle denervation required clinical history and physical examination, allied to electromyography (EMG) or nerve conduction studies. MRI provides a useful clinical tool to [...]

Findings and procedure details: In this section, using case examples identified on Shoulder MRI or Brachial Plexus MRI, acquired on 1.5T MRI scanners, we will illustrate patterns of denervation that may be identified on MRI, causes of such findings, and where relevant, important anatomical features that may help to identify a caus[...]

Conclusion: Denervation syndromes of the shoulder are uncommon but important cause of shoulder pain and weakness. MRI is commonly performed in patients with shoulder pain of uncertain origin and can determine the cause and location of nerve injury and muscle denervation. Knowledge of the relevant anatomy, cause[...]

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References: Kamath, S., Venkatanarasimha, N., Walsh, M.A. et al. MRI appearance of muscle denervation. Skeletal Radiol (2008); 37: 397. Gaskin CM, Helms CA. Parsonage-Turner syndrome: MR imaging findings and clinical information of 27 patients. Radiology (2006);240 (2): 501-7. Yanny S, Toms A. MR Patterns of De[...]

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