S72.479K Torus fracture of lower end of unspecified femur, subsequent encounter for fracture with nonunion

Name of the Condition

• Torus fracture of lower end of unspecified femur, subsequent encounter for fracture with nonunion

Summary

This condition involves a torus (buckle) fracture at the distal (lower) end of the femur, the thigh bone, near the knee joint. Torus fractures are incomplete breaks that result in a buckling of the bone cortex, typically occurring in children due to the flexibility of their bones. The fracture may involve the metaphyseal region, which is the area between the growth plate and the shaft of the bone, and can affect the stability of the knee joint. This code specifies a subsequent encounter for a fracture with nonunion, meaning the fracture has not healed properly after previous treatment.

Causes

Direct force or axial loading to the femur, such as a fall onto the knee or a blow to the thigh. Common in children due to their developing bone structure, which is more pliable and prone to buckling rather than complete fracture. Nonunion may result from inadequate immobilization, poor blood supply, or infection.

Risk Factors

• Pediatric age group, particularly during periods of rapid growth.
• Participation in high-impact activities or sports.
• Prior history of bone injuries or developmental abnormalities.
• Inadequate initial fracture management or immobilization.

Symptoms

• Persistent localized pain and tenderness at the fracture site.
• Swelling or mild deformity around the knee.
• Limited range of motion in the knee joint.
• Possible difficulty bearing weight on the affected leg.
• Delayed healing or lack of progress in fracture recovery.

Diagnosis

Physical examination to assess pain, swelling, and limb alignment. Imaging studies, such as X-rays, to confirm the torus fracture pattern and evaluate for nonunion. CT scans may be used to assess bone healing and identify gaps or misalignment. Clinical history of prior fracture treatment is essential for diagnosis.

Treatment Options

• Immobilization with a cast or brace to stabilize the fracture.
• Surgical intervention, such as internal fixation, to promote healing.
• Bone grafting or electrical stimulation to encourage bone union.
• Physical therapy to restore range of motion and strength.

Prognosis and Follow-Up

Prognosis depends on the severity of the nonunion and response to treatment. Regular follow-up with imaging is necessary to monitor healing. Most patients achieve full recovery with appropriate management, though some may experience long-term joint stiffness or weakness.

Complications

• Chronic pain or discomfort.
• Persistent limited mobility.
• Increased risk of future fractures.
• Potential need for additional surgery.

Lifestyle & Prevention

• Avoid high-impact activities until cleared by a healthcare provider.
• Follow prescribed immobilization and rehabilitation protocols.
• Maintain a balanced diet rich in calcium and vitamin D to support bone health.
• Use protective gear during sports or activities to reduce injury risk.

When to Seek Professional Help

Seek immediate medical attention if experiencing severe pain, swelling, or inability to bear weight. Consult a healthcare provider if symptoms worsen or do not improve with treatment.

Tips for Medical Coders

This code is used for a subsequent encounter for a torus fracture of the lower femur with nonunion. Document the fracture location, encounter type (subsequent), and nonunion status clearly. Ensure clinical documentation supports the diagnosis and treatment provided.