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Clin Radiol. 2016 Apr;71(4):316-20. doi: 10.1016/j.crad.2015.11.015. Epub 2016 Jan 11.

MRI findings of spinal accessory neuropathy.

Author information

1
Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70(th) St., New York, NY 10021, USA; Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA. Electronic address: angela.li.rad@gmail.com.
2
Department of Radiology and Imaging, Hospital for Special Surgery, 535 E 70(th) St., New York, NY 10021, USA; Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA.
3
Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA; Hand and Upper Extremity Service, Hospital for Special Surgery, 535 E 70(th) St., New York, NY 10021, USA.
4
Weill Cornell Medical College, 1300 York Ave, New York, NY 10021, USA; Department of Physiatry, Hospital for Special Surgery, 535 E 70(th) St., New York, NY 10021, USA.

Abstract

AIM:

To characterise the magnetic resonance imaging (MRI) appearance of patients with spinal accessory nerve (SAN) denervation.

MATERIAL AND METHODS:

Twelve patients who had SAN denervation on electromyography (EMG) were included. The sternocleidomastoid and trapezius muscles and the SAN were assessed using MRI.

RESULTS:

Trapezius muscle atrophy was seen in 11 (92%), and of those patients, T2/short tau inversion recovery (STIR) signal hyperintensity was also demonstrated in seven (58%). All three patients with prior neck surgery had scarring around the SAN, and one of these patients demonstrated a neuroma, which was confirmed surgically.

CONCLUSION:

Features of SAN neuropathy on MRI include atrophy and T2/STIR signal hyperintensity of the trapezius, and in patients who have had posterior triangle neck surgery, scarring may be seen around the nerve.

PMID:
26787069
DOI:
10.1016/j.crad.2015.11.015
[Indexed for MEDLINE]

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