S82.862 Displaced Maisonneuve's fracture of left leg

Name of the Condition

• Displaced Maisonneuve's fracture of left leg
• ICD-10 Code: S82.862

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 proximal fibula.
• Difficulty bearing weight on the affected leg.
• Instability or a feeling of the ankle "giving way."
• Bruising or tenderness along the lower leg.
• Possible deformity or misalignment of the fractured bone.

Diagnosis

Diagnosis involves a physical examination to assess ankle stability, tenderness, and swelling. Imaging, typically X-rays, is used to identify the proximal fibula fracture and associated injuries. Additional imaging, such as CT or MRI, may be required to evaluate soft tissue damage or other fractures. The displaced nature of the fracture is confirmed through radiographic assessment.

Treatment Options

Treatment depends on the severity of displacement and associated injuries. Non-surgical options include immobilization with a cast or brace and pain management. Surgical intervention may be necessary to realign and stabilize the fracture, often involving fixation with screws or plates. Rehabilitation focuses on restoring strength and mobility.

Prognosis and Follow-Up

Prognosis is generally good with appropriate treatment, though recovery may take several months. Follow-up care includes regular imaging to monitor healing and physical therapy to regain function. Long-term outcomes depend on the extent of the injury and adherence to rehabilitation protocols.

Complications

Potential complications include chronic ankle instability, post-traumatic arthritis, nonunion or malunion of the fracture, and nerve or vascular damage. Infection or hardware-related issues may occur if surgery is performed.

Lifestyle & Prevention

• Wear appropriate footwear for activities to reduce fall risk.
• Strengthen ankle muscles through targeted exercises.
• Avoid uneven terrain or surfaces that increase rotational stress.
• Use protective gear during high-risk sports or activities.

When to Seek Professional Help

Seek immediate medical attention if you experience severe pain, inability to bear weight, visible deformity, or signs of infection (e.g., fever, increased swelling, redness). Prompt evaluation is critical to prevent complications and ensure proper treatment.

Tips for Medical Coders

Document the displaced nature of the fracture and specify the left leg. Include details of associated injuries (e.g., medial malleolus fracture, ligament tears) if present, as these impact coding accuracy. Ensure documentation supports the mechanism of injury (rotational force) and any surgical or non-surgical interventions.