Acromioclavicular Joint Arthritis
What is acromioclavicular joint and where is it located? The acromioclavicular (ACJ) is a small joint between the collarbone (clavicle) and the tip of the shoulder blade (acromion). It is located at the tip of the shoulder forming the highest point of the shoulder. Like many other joints in the body, it has cartilage covering the ends of the bone, is surrounded by a capsule and stabilised by strong ligaments. This joint has minimal mobility. It is involved in overhead arm movement and when the arm is moved across the body. Arthritis of this joint is more common than that of the shoulder joint (glenohumeral joint) although is less common than that of the hip and the knee joints. It is mostly seen in the middle-aged people and weightlifters and hence the other name of the condition “Weightlifter’s Shoulder”. What are the symptoms of ACJ arthritis? Common presenting features include: Pain over the top of the shoulder Difficulty reaching the arm across the body as while putting on a ...