trimalleolar

Trimalleolar refers to a fracture involving all three malleoli of the ankle. The ankle joint is formed by the tibia and fibula, the two bones of the lower leg, and the talus, a bone in the foot. The malleoli are the bony prominences at the lower end of the tibia and fibula. The medial malleolus is on the inside of the ankle, the lateral malleolus is on the outside, and the posterior malleolus is at the back of the tibia.

A trimalleolar fracture is a severe injury that typically results from significant trauma, such as a fall from a height or a motor vehicle accident. This type of fracture often causes the ankle joint to become unstable, leading to displacement of the bones and potential damage to the surrounding ligaments and cartilage. Symptoms commonly include intense pain, swelling, bruising, and the inability to bear weight on the affected leg.

Diagnosis of a trimalleolar fracture is usually made through physical examination and imaging studies, primarily X-rays. In some cases, a CT scan may be necessary for a more detailed assessment of the fracture pattern and degree of displacement. Treatment depends on the severity and stability of the fracture. Non-displaced fractures may be managed with immobilization, such as casting. However, displaced trimalleolar fractures almost always require surgical intervention to realign the broken bone fragments and restore stability to the ankle joint. This often involves the use of plates, screws, and pins. Recovery can be lengthy and may involve physical therapy to regain strength and range of motion.