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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.


Figure 1
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  		Fig. 1 —Bar graph illustrates spectrum of muscles of shoulder girdle and chest wall that were affected in patients with Parsonage-Turner syndrome and shows percentage of patients with involvement of each muscle. Supraspinatus and infraspinatus muscles were most commonly affected muscle groups, which explains why presenting symptoms mimicked rotator cuff tendon tears or mass in spinoglenoid notch that impinged on suprascapular nerve.

 

Figure 2
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  		Fig. 2A —38-year-old man with mild pain and paresthesia along lateral aspect of arm. Axial T2-weighted fast spin-echo image with fat saturation of right shoulder shows increased T2 signal (arrowheads) throughout infraspinatus muscle that is compatible with edema.

 

Figure 3
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  		Fig. 2B —38-year-old man with mild pain and paresthesia along lateral aspect of arm. Axial T1-weighted fast spin-echo image shows no detectable atrophy or fatty infiltration of infraspinatus muscle (arrowheads).

 

Figure 4
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  		Fig. 3A —39-year-old man with pain and paresthesias in right shoulder and upper extremity. Axial T2-weighted fast spin-echo image of right shoulder with fat saturation shows increased T2 signal throughout infraspinatus (I), subscapularis (S), and portion of deltoid (D) muscles that is compatible with edema.

 

Figure 5
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  		Fig. 3B —39-year-old man with pain and paresthesias in right shoulder and upper extremity. Axial T1-weighted fast spin-echo image shows mild atrophy and fatty infiltration of affected muscles: infraspinatus (I), subscapularis (S), and deltoid (D) muscles.

 

Figure 6
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  		Fig. 4A —18-year-old man with shoulder pain and progressive left upper extremity weakness. Oblique sagittal (A) and axial (B) T2-weighted images with fat saturation show increased T2 signal in supraspinatus (S) and infraspinatus (I) muscles.

 

Figure 7
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  		Fig. 4B —18-year-old man with shoulder pain and progressive left upper extremity weakness. Oblique sagittal (A) and axial (B) T2-weighted images with fat saturation show increased T2 signal in supraspinatus (S) and infraspinatus (I) muscles.

 

Figure 8
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  		Fig. 4C —18-year-old man with shoulder pain and progressive left upper extremity weakness. Axial T1-weighted image shows atrophy of infraspinatus muscle (arrowhead).

 

Figure 9
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  		Fig. 5A —52-year-old man with acute onset of severe left shoulder pain. Oblique coronal (A) and oblique sagittal (B) T2-weighted images with fat saturation show increased T2 signal in supraspinatus (S), infraspinatus (I in B), and deltoid (D) muscles.

 

Figure 10
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  		Fig. 5B —52-year-old man with acute onset of severe left shoulder pain. Oblique coronal (A) and oblique sagittal (B) T2-weighted images with fat saturation show increased T2 signal in supraspinatus (S), infraspinatus (I in B), and deltoid (D) muscles.

 

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