Scapular winging and poly-hill sign in facioscapulohumeral muscular dystrophy (FSHD)

Scapular winging and poly-hill sign. Pronounced bilateral, but asymmetric, scapular winging. Note the typical poly-hill configuration on the right shoulder caused by (1) atrophy of the trapezius muscle, (2) superior angle of the overriding scapula, (3) displaced acromioclavicular joint, (4) atrophy of the proximal deltoid muscle, and (5) sparing of the distal deltoid muscle.