Acromioclavicular osteoarthritis (AO) is a common type of arthritis that affects the shoulder. It happens when the cartilage wears down between the collarbone and the acromion, the bony tip of the ...

Shoulder injuries and different types of arthritis may cause acromioclavicular (AC) joint pain. The AC joint in the shoulder connects the collarbone to part of the shoulder blade. One of the AC ...

Osteoarthritis of the acromioclavicular joint is a common cause of pain in patients aged over 50. Patients present with pain directly over the joint, and the diagnosis is confirmed on examination. • ...