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Fig. 2 | Insights into Imaging

Fig. 2

From: Nerve entrapment syndromes of the upper limb: a pictorial review

Fig. 2

37-year-old female with lateral scapular winging after schwannoma excision. Axial T1 at the level of the thoracic inlet (a) demonstrates asymmetry of the trapezius muscles (white arrows) with right-sided volume loss. Axial T1 fat-saturated post-contrast study (b) shows the avidly-enhancing schwannoma, which was located at level 2B in the upper posterior neck, deep to the upper sternocleidomastoid muscle and immediately posterior to the right internal jugular vein (blue arrow). This is along the expected path of the accessory nerve. While the nerve lesion in this case was caused by surgery, the illustrated muscle changes are also seen in entrapment

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