Impingement syndrome with supraspinatus tendinopathy and atrophy
Chronic right shoulder pain and weakness.
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The right acromioclavicular joint shows hypertrophic osteoarthropathy that assumes a callus-like appearance. Consequent compression of the underlying paratendinous fat planes and the related passing part of the supraspinatus tendon. The muscle bulk of supraspinatus is remarkably diminished with diffuse fatty infiltration. The distal part of the supraspinatus tendon till its insertion shows intermediate signal on T1, PD and T2 WIs with diffuse relative thickening. No definite tendon discontinuity or gap. Excess fluid in the subacromial bursa.