How does the impingement syndrome present clinically?
• Pain with active shoulder movement (patient moves arm), especially flexion (between 60 and 120 degrees), abduction and internal rotation.
• Much less or no pain with passive movement (examiner moves arm).
• Absence of swelling, redness, or warmth at shoulder joint.
• Radiographically, the space between the humeral head and inferior surface of the acromion may be <8 mm.