Recognition of significantly displaced fractures, especially in the posterior or retrosternal direction requires urgent assessment and treatment due to potential injuries to the underlying neurovascular structures and airway. Medial end fractures are often missed. These fractures are rare and may present as stress fractures from repetitive strain/activity in pathologic or osteoporotic bone, or from high energy blunt / penetrating trauma with multisystem injuries. These patients may have increased mortality due to the severity of their other life-threatening injuries.
Definition: The segment of the clavicle involving the costoclavicular ligament.
Further details on clinical and radiological examination can be found here .
Extra articular fractures of the medial end of the clavicle are classified as AO/OTA 15.1A fractures.