Final answer:
A PAB ankle fx refers to a fracture of the ankle bone involving the posterior malleolus, anterior malleolus, and fibula. It usually occurs due to a high-energy injury and may require surgery for treatment.
Step-by-step explanation:
A PAB ankle fx refers to a fracture of the ankle bone involving the posterior malleolus, anterior malleolus, and fibula. The posterior malleolus is the bony prominence at the back of the ankle, while the anterior malleolus is the bony prominence at the front of the ankle. The fibula is a long bone that runs alongside the tibia in the lower leg. When a PAB ankle fx occurs, it usually involves a high-energy injury such as a car accident or a fall from a significant height. The fracture is often unstable and may require surgical intervention to realign and stabilize the broken bones.