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DOI:10.2214/AJR.06.1136
AJR 2007; 189:W39-W44
© American Roentgen Ray Society

Clinical Observations

MRI Findings of 26 Patients with Parsonage-Turner Syndrome

Richard E. Scalf1, Doris E. Wenger1, Matthew A. Frick1, Jayawant N. Mandrekar2 and Mark C. Adkins1

1 Department of Radiology, Mayo Clinic, 200 First St., SW, Rochester, MN 55905.
2 Division of Biostatistics, Mayo Clinic, Rochester, MN.

OBJECTIVE. The objective of our study was to describe the MRI features of patients with Parsonage-Turner syndrome. Familiarity with the MRI features associated with this entity is important because radiologists may be the first to suggest the diagnosis. Twenty-six patients with Parsonage-Turner syndrome were treated at our institution between 1997 and 2005. We retrospectively reviewed the MR images of patients with clinical or electromyographic evidence (or both) of acute brachial neuritis without a definable cause.

CONCLUSION. MRI of the brachial plexus and shoulder in patients with Parsonage-Turner syndrome showed intramuscular denervation changes involving one or more muscle groups of the shoulder girdle. The supraspinatus and infraspinatus muscles were the most commonly involved. MRI is sensitive for detecting signal abnormalities in the muscles of the shoulder girdle of patients with Parsonage-Turner syndrome. MRI may be instrumental in accurately diagnosing the syndrome.

Keywords: denervation • idiopathic brachial neuritis • MRI • musculoskeletal imaging • Parsonage-Turner syndrome • shoulder


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