Acromioclavicular joint configuration

Dr Craig Hacking and A.Prof Frank Gaillard et al.

There is much variation in acromioclavicular (AC) joint configuration which may be confused with pathology. 

The relationship of the acromion to the distal clavicle at the AC joint can be described in the coronal plane as 1, 2, 3:

  • horizontal: normal
  • low lying: associated with shoulder impingement (unfortunately, there are no criteria for distinguishing a low-lying acromion from a high-riding clavicle) 2
  • inferolateral: associated with shoulder impingement
Upper limb anatomy
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Article information

rID: 844
Section: Anatomy
Tags: stub, cases
Synonyms or Alternate Spellings:
  • AC joint configuration

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