An acromioclavicular (AC) joint sprain is an injury to the ligaments stabilizing the joint between the acromion of the scapula and the lateral end of the clavicle. It often presents as pain over the top of the shoulder and may be associated with a visible bump or deformity. AC joint sprains are common in sports and traumatic falls. Because the AC joint plays a role … Continue reading Acromioclavicular joint sprain