HSS Journal: Volume 10, Issue 2
Acromioclavicular (AC) joint dislocations are among the most common shoulder injuries. Heterotopic ossification (HO) of the structures adjacent to the AC is recognized to occur after injury; however, the incidence and location of the HO is poorly defined. In general, formation of heterotopic bone is associated with immobilization after trauma, severe burn wounds, spinal cord injury, and head injury. In the setting of AC, joint dislocation ossification is conventionally thought to directly involve damaged coracoclavicular and coracoacromial ligaments. The HO may also be seen after distal clavicle excision. In the two cases reported, heterotopic bone formation was found posterior–inferior to the lateral clavicle and actually blocking reduction of the clavicle during surgical reconstruction.
Level of Evidence: Level IV: Prospective Case Series.
This article appears in HSS Journal: Volume 10, Issue 2.
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About the HSS Journal
HSS Journal, an academic peer-reviewed journal published three times a year, February, July and October. The Journal accepts and publishes peer reviewed articles from around the world that contribute to the advancement of the knowledge of musculoskeletal diseases and disorders.