Clavicular fractures are common fractures usually resulting from direct trauma. The middle third of the bone is injured 80 % of the time. Adjacent vessels and nerves are often injured as well. These injuries commonly result from seatbelt use in a frontal collision.
AP radiograph of the left clavicle. There is an acute mid-clavicular fracture. 
AP radiograph of the left clavicle. This particular fracture has not healed, indicating nonunion.