label: Acromioclavicular joint separation
label_lc: acromioclavicular joint separation
description: An acromioclavicular (AC) joint joint separation, often called a shoulder separation, is a dislocation of the clavicle from the acromion. This feature is ascertainable radiographically by AC joint x-ray views including bilateral anteroposterior (AP) view, axillary lateral view, and/or Zanca view showing either superior, posterior, or inferior displacement of the distal clavicle in relation to the acromion at the AC joint.