Figure 8. Ruptured hemidiaphragm in a 62-year-old man who sustained the injury in a motor vehicle accident. Frontal chest radiograph shows a rounded mass in the left lower thorax (white arrowheads). Fractures of the left sixth and seventh ribs (black arrowheads) indicate an area of substantial trauma and are a clue that the mass represents abdominal viscera herniated through a tear in the hemidiaphragm. Pneumopericardium is also present (arrows).