S82.861 Displaced Maisonneuve's fracture of right leg

Name of the Condition

• Displaced Maisonneuve's fracture of right leg
• ICD-10 Code: S82.861

Summary

A Maisonneuve's fracture is a specific type of ankle injury involving a fracture of the proximal fibula (upper portion of the smaller lower leg bone) combined with a tear of the syndesmotic ligaments and often an associated fracture of the medial malleolus or deltoid ligament injury. The term "displaced" indicates that the fractured bone fragments are not aligned properly. This injury typically results from rotational forces applied to the ankle, commonly seen in trauma such as falls or sports injuries.

Causes

The fracture is caused by external rotational forces applied to the ankle, often during activities that involve twisting or turning. Common scenarios include falls, motor vehicle accidents, or sports-related impacts where the foot is planted and the body rotates forcefully. The mechanism typically involves the talus rotating outward, stressing the syndesmotic ligaments and causing the proximal fibula to fracture.

Risk Factors

• Participation in high-impact sports or activities with sudden directional changes.
• Previous ankle injuries or ligamentous instability.
• Traumatic events involving rotational forces to the ankle.
• Age-related factors that may affect bone density or ligament integrity.

Symptoms

• Severe pain and swelling around the ankle and lower leg.
• Difficulty bearing weight on the affected leg.
• Bruising and tenderness at the fracture site (proximal fibula) and ankle.
• Possible deformity or instability of the ankle joint.
• Pain with rotation or movement of the foot.

Diagnosis

Diagnosis begins with a physical examination to assess pain, swelling, and stability of the ankle. Imaging is critical, with X-rays of the ankle and proximal fibula used to identify the fracture and displacement. Additional imaging, such as CT scans or MRIs, may be employed to evaluate associated ligament injuries or confirm the extent of displacement. Clinical correlation with the mechanism of injury is essential for accurate diagnosis.

Treatment Options

Treatment depends on the severity of displacement and associated injuries. Non-surgical management may involve immobilization with a cast or brace, followed by physical therapy. Surgical intervention is often required for displaced fractures to realign the bone and stabilize the syndesmosis, typically using screws or plates. Post-treatment, rehabilitation focuses on restoring strength and range of motion.

Prognosis and Follow-Up

Prognosis is generally favorable with appropriate treatment, though recovery may take several months. Follow-up care includes regular imaging to monitor healing and assess for complications like malunion or arthritis. Physical therapy is crucial to restore function, and patients are advised to avoid high-impact activities until cleared by a healthcare provider. Long-term outcomes depend on the accuracy of reduction and adherence to rehabilitation.

Complications

• Malunion or nonunion of the fibula fracture.
• Chronic ankle instability or arthritis due to ligament damage.
• Nerve or vascular injury in severe cases.
• Persistent pain or functional limitations if treatment is delayed or inadequate.

Lifestyle & Prevention

• Wear appropriate footwear and protective gear during sports.
• Strengthen ankle muscles and improve balance to reduce injury risk.
• Avoid activities with high rotational forces if previous ankle injuries exist.
• Seek prompt evaluation for ankle trauma to prevent delayed diagnosis.

When to Seek Professional Help

Seek immediate medical attention if you experience severe ankle pain, inability to bear weight, or visible deformity after an injury. Persistent swelling, bruising, or instability also warrants evaluation, as these may indicate a displaced fracture requiring urgent care.

Tips for Medical Coders

Document the specific location (right leg) and displacement status clearly. Ensure the fracture is classified as Maisonneuve's type, with associated ligament or malleolar injuries documented if present. Use S82.861 for displaced Maisonneuve's fracture of the right leg, and verify that no other specific codes (e.g., for associated malleolar fractures) are required unless explicitly documented.