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A fibula fracture occurs when there is an injury in the leg to one of the two bones of the leg. The leg (the segment between the ankle and knee) is made up of two bones. The larger bone, the tibia, carries most of the weight of the body). The smaller bone, the fibula, is located on the outside part of the leg.
The fibular bone starts just below the knee joint on the outside of the leg and extends all the way down to the ankle joint. The bone is a thin, long bone, hollow in its center. While the bone does little to support the body weight, it is a critical site of attachment for ligaments at both the ankle and knee joint and is also connected to the tibia by a thick ligament called the syndesmosis.
While the fibula is a significant bone, it is possible to extract much of the bone for surgical procedures where the bone is needed elsewhere in the body. When these grafting procedures are performed, people can function very normally, despite missing a large part of the fibula bone.
Types of Fibula Fractures
There are several types of injury to the fibula bone. For this discussion, I will divide them into more manageable topics:
- Fibula fractures that occur due to injury to the ankle joint
- Fibula fractures that occur in conjunction with tibia fractures
- Stress fractures of the fibula
These are not the only types of injury that can occur to the fibula but account for the majority of cases of injury to the fibula bone. By far the most common are injuries that occur when the ankle joint is damaged. Typically, the ankle buckles or is twisted and the fibula is injured as part of the injury.
As mentioned, fibula fractures can occur in association with injuries to the ligaments, other bones, tendons, and tendons around the knee and ankle. The most common symptoms related to the fibula fracture include:
- Pain directly over the fibula bone (outside of the leg)
- Swelling in the fracture part
- Bruising over the injury site
Diagnosis of a fibular fracture can typically be done with an x-ray image. Other imaging studies such as CT scan or MRI are typically not necessary, but there are some situations where a fibular fracture may not show up on a regular x-ray. These conditions include injuries such as stress fractures. Your physician will examine the injury site, the ankle and knee joints for associated injuries which may impact the treatment of the fibular fracture.
Fibula fractures typically occur as part of an ankle injury. Whenever a fibula fracture is found, the ankle joint should be examined for an injury that can be possible.
The most common kind of fracture to occur to the fibula bone is an isolated injury to the end of the fibula bone at the level of the ankle joint. These injuries occur in a similar manner to a badly sprained ankle, and mostly the injury can be treated similarly to a badly sprained ankle.