The ribs 4-8 are commonly fractured; which statement best describes this?

• A. The most commonly fractured ribs
• B. The least commonly fractured ribs
• C. They are always associated with pneumothorax
• D. They do not fracture in children

Answer: (A)

Blunt chest trauma tends to fracture the middle ribs—the 4th through the 8th—more often than the others. This region takes direct force from impacts and isn’t as shielded as the upper ribs by the clavicle and shoulder girdle, while the lower ribs are more protected by abdominal organs. That combination makes these middle ribs the most likely to crack when the chest is struck, so the best description is that they are the most commonly fractured.

Pneumothorax can occur with rib fractures, but it isn’t guaranteed with every fracture, so saying they are always associated with pneumothorax isn’t accurate. And children can fracture ribs too, though their ribs are more flexible, so claiming they don’t fracture in children isn’t correct.