MRI Denervation around the Shoulder: Parsonage Turner Syndrome

Parsonage Turner Syndrome is a brachial neuritis that can cause denervation of muscles around the shoulder joint.

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WHAT TO LOOK FOR ON MRI

  1. Denervation ( acute or chronic) of Supraspinatus and Infraspinatus
  2. NO mass in region of suprascapular nerve

Image Above: Denervation of supraspinatus ( Orange arrow) and infraspinatus ( Pink arrow). Increased signal on PDFS on keeping with acute denervation. No mass present in supra scapular region or compression of suprascapular nerve seen.

OTHER MUSCLES INVOLVED

  1. Most commonly we see only Supraspinatus and Infraspinatus involved
  2. But can get other muscles around the shoulder affects as well
    • Deltoid/ Subscapularis/ Teres Minor
    • See table below.

mri-parsonage-turner-syndrome-brachial-neuritis-muscles-involved-radiology-education-asia

Image Above: Most common muscles involved in Parsonage Turner Syndrome are Supraspinatus and Infraspinatus. But there can also be involvement of deltoid, teres minor and subscapularis less commonly. From AJR 2007 189: W39-W44 Richard Scalfe et al.

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