Neglected Type IV Acromioclavicular Joint Injury: 2 Cases Report

Acromioclavicular joint injuries usually occur as a result of direct trauma to the superolateral aspect of the shoulder. Roockwood Type IV injuries are relatively uncommon, and they are easily misdiagnosed or neglected in patients who have suffered multiple traumas. Therefore, to correctly treat a patient with type IV injury, we need to take a careful physical examination and conduct proper radiologic evaluation for the acromioclavicular joint. We report here on two cases of modified Weaver-Dunn reconstruction for neglected type IV acromioclavicular joint injuries that were associated with multiple rib fractures.