S82.446 Nondisplaced spiral fracture of shaft of unspecified fibula

Name of the Condition

• Nondisplaced spiral fracture of shaft of unspecified fibula

Summary

A nondisplaced spiral fracture of the fibular shaft is a bone break characterized by a helical pattern along the shaft of the fibula, with no misalignment of the bone fragments. This fracture typically results from twisting forces applied to the leg and may cause pain and limited mobility, though the bone remains in its normal position.

Causes

Most commonly caused by twisting injuries to the lower leg, such as those sustained during sports, falls, or accidents. High-impact trauma, including direct blows or rotational forces, can also lead to this type of fracture.

Risk Factors

• Participation in activities with high rotational stress (e.g., skiing, gymnastics).
• Osteoporosis or reduced bone density.
• Previous lower leg injuries or fractures.
• Advanced age, which may weaken bone strength.

Symptoms

• Severe pain and swelling in the lower leg.
• Bruising and tenderness at the fracture site.
• Inability to bear weight on the affected leg.
• Possible deformity or instability of the leg.

Diagnosis

Diagnosis involves a physical examination to assess pain, swelling, and deformity. X-rays are typically used to confirm the fracture and its spiral pattern. Additional imaging, such as CT or MRI, may be ordered for complex cases or to evaluate soft tissue damage.

Treatment Options

• Immobilization with a cast or splint to allow the bone to heal.
• Pain management with medications like NSAIDs or acetaminophen.
• Physical therapy to restore strength and mobility once healing progresses.
• Monitoring for complications, such as delayed union or nonunion.

Prognosis and Follow-Up

Most nondisplaced spiral fractures of the fibula heal well with proper immobilization and rest. Follow-up appointments are typically scheduled to monitor healing via X-rays and assess functional recovery. Full weight-bearing is usually permitted once pain subsides and the fracture shows signs of union.

Complications

• Delayed healing or nonunion of the fracture.
• Persistent pain or stiffness in the lower leg.
• Nerve or vascular injury, though rare with nondisplaced fractures.
• Post-traumatic arthritis in severe cases.

Lifestyle & Prevention

• Wear appropriate protective gear during high-risk activities.
• Maintain bone health through adequate calcium and vitamin D intake.
• Avoid sudden twisting motions or falls by using caution in uneven terrain.
• Strengthen lower leg muscles to improve stability and reduce injury risk.

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, redness, drainage) at the fracture site.

Tips for Medical Coders

Document the fracture as "nondisplaced" and specify the fibular shaft location. Ensure the term "unspecified" is used if the laterality (right/left) is not documented. Include details on the fracture pattern (spiral) and shaft involvement for accurate coding.