What is Acromioclavicular OA?
The acromioclavicular joint, also known as the AC joint, is located at the top of the shoulder where the clavicle meets the top part of the shoulder blade. The acromioclavicular (AC) joint in the shoulder is a common spot for osteoarthritis to develop in middle age. Degeneration of the AC joint can be painful and can cause difficulty using the shoulder for everyday activities.
Overuse or previous trauma can be related to developing AC OA. The AC joint is under constant stress as the arm is used overhead. Weightlifters and others who repeatedly lift heavy amounts of weight overhead tend to have an increased occurrence of the condition, and often at a younger age.