Hemothorax resulting from an initially masked aortic perforation caused by penetration of the sharp edge of a fractured rib: A case report

•Rare aortic injury from a rib fracture, which is not found in primary evaluation.•Hemothorax with great vessel injury can be fatal and should be detected using computed tomography.•Some great vessel injuries cannot be detected through contrast-enhanced chest computed tomography.•Great vessel injury should be considered in hemothorax with multiple rib fractures.