Which injury involves the heel bone?

The correct answer is the fractured calcaneus. The calcaneus, commonly known as the heel bone, is the largest bone in the foot and serves as a critical weight-bearing structure. Fractures of the calcaneus can occur due to high-impact injuries, such as falling from a height or motor vehicle accidents.

Understanding the role of the calcaneus is important, particularly in the context of surgical assistance and orthopedic care, as healing from a calcaneal fracture can significantly affect a patient's mobility and overall foot function. Such injuries often require careful management and, in some instances, surgical intervention to ensure proper alignment and healing.

Other options mentioned, like the fractured lateral malleolus and dislocated foot, involve bones and structures in the ankle and lower leg, rather than the heel bone specifically. Radial nerve damage pertains to nerve injury rather than a bone injury, illustrating the diverse range of potential trauma one might encounter in surgical contexts.