<unk>  is present in about 1% of cases of blunt trauma and 3–5% of shoulder injuries. An estimated 0.4–1% of bone fractures are<unk> s. The injury is associated with other injuries 80–90% of the time.<unk>  is associated with pulmonary contusion more than 50% of the time. Thus when the<unk> is fractured, other injuries such as abdominal and chest trauma are automatically suspected. People with<unk> s often also have injuries of the ribs, lung, and shoulder. Pneumothorax (an accumulation of air in the space outside the lung), clavicle fractures, and injuries to the blood vessels are among the most commonly associated injuries. The forces involved in<unk>  can also cause tracheobronchial rupture, a tear in the airways. Fractures that occur in the<unk>  body are the type most likely to be accompanied by other injuries; other bony and soft tissue injuries accompany these fractures 80–95% of the time. Associated injuries can be serious and potentially deadly, and usually it is the associated injuries, rather than the<unk> , that have the greatest effect on the outcome.<unk> s can also occur by themselves; when they do, the death rate (mortality) is not significantly increased. The mean age of people affected is 35–45 years.
Scapular fracture
Bosworth fracture
Jefferson fracture
Rolando fracture
March fracture
Scaphoid fracture
Hume fracture
Smith fracture