US supraspinatus full thickness tear long axis view

Long axis ultrasound (US) image of a full thickness supraspinatus tear. Bursal tissue (star) lying on the articular cartilage can mimic the appearance of tendon tissue leading to the misdiagnosis of an intact rotator cuff. The presence of a cartilage interface sign (arrows) and significant erosion of the greater tuberosity (GT) assists with the diagnosis of a full thickness rotator cuff tear.