Anterior mediastinal bleeding caused by blunt chest injury is dangerous. Patients with rupture of large cardiac vessels often die of massive blood loss before getting to a hospital. The internal thoracic artery and vein, intercostal vessels or fracture ends caused bleeding that resulted in a mediastinal hematoma (1,2). Due to the nature of blunt chest injuries, the variation of anterior mediastinal hematoma cases is wide, and the specific source of bleeding is not always clear.