Fractured coracoid process in acromioclavicular dislocations. Report of four cases and review of the literature.

Acromioclavicular (AC) dislocation with a concomitant coracoid process fracture occurs infrequently. This fracture should be suspected with all AC dislocations occurring in the first three decades of life. An axillary lateral radiograph or tomogram often is needed to detect the fracture. Surgical treatment can produce good results, but equally satisfactory function with minimal residual cosmetic deformity may be achieved by nonsurgical measures.