PMC8564197_01
Bilateral scapular winging (right > >left) during (a) wall push test and (b) active shoulder flexion. The patient is unable to elevate his right arm to a horizontal level.
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fig1
Scapular winging produced by the wall push test and active shoulder elevation was observed bilaterally (right > >left) (Figure 1).
T1-weighted magnetic resonance image showing slight atrophy of the serratus anterior muscle (dotted line) on the right side compared with left side in the axial plane. SSc: subscapularis muscle; IS: infraspinatus muscle; Del: Deltoid muscle.
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However, magnetic resonance imaging (MRI) revealed atrophy of both the SA and subclavius muscles on the right side, but no significant pathology was observed in the shoulder joint or cervical spine (Figure 2).