We examined 200 scapular bones for signs of degenerative changes in the coraco-acromial arch. The slope and length of the acromion and the height of the arch were found to be most closely associated with degenerative change. These anatomical features are not significantly altered by current techniques of subacromial decompression.

We dissected 60 shoulders to demonstrate the anatomy of the coracohumeral ligament. The role of this structure in clinical problems of the shoulder is discussed.