The acromioclavicular joint is the articulation between the acromion process of the scapula and the lateral end of the clavicle.

The surgeon may also remove small amounts of bone from the underside of the acromion and the acromioclavicular joint (acromioplasty).

Distal clavicular osteolysis (DCO) is often associated with problems weightlifters have with their acromioclavicular joints due to high stresses put on the clavicle as it meets with the acromion.

His 22-year-old mother also had a height of 142 cm with an arm span of 136 cm and rhizomelic shortness of the limbs, maximal in the arms, and abnormalities of the acromioclavicular joints.

Incidental x-ray findings of bone spurs at the adjacent acromio-clavicular joint (A-C joint) may show a bone spur growing from the outer edge of the clavicle downwards towards the rotator cuff.