M67.35 Transient synovitis, hip

Name of the Condition

• Transient Synovitis, Hip

Summary

Transient synovitis of the hip is a self-limiting inflammatory condition affecting the synovial membrane of the hip joint. It typically presents with hip pain and limping, especially in children, and resolves without long-term sequelae.

Causes

The exact cause is often unknown but may follow viral infections or minor trauma. Allergic reactions or joint stress can also contribute to its development.

Risk Factors

• Most common in children aged 3 to 10 years.
• Slightly higher prevalence in boys.
• Recent upper respiratory infections may increase risk.

Symptoms

• Sudden onset of hip pain, usually unilateral.
• Limping or reluctance to bear weight on the affected limb.
• Swelling and tenderness around the joint.
• Mild fever may accompany symptoms.

Diagnosis

Diagnosis is primarily clinical, based on history and physical exam. Ultrasound may confirm joint effusion, while blood tests and X-rays help rule out other conditions.

Treatment Options

• Rest and avoidance of weight-bearing activities.
• Nonsteroidal anti-inflammatory drugs (NSAIDs) for pain and inflammation.
• Supportive care until symptoms resolve.

Prognosis and Follow-Up

Most cases resolve within weeks with no long-term effects. Follow-up may involve monitoring for recurrence or ruling out other conditions if symptoms persist.

Complications

Rarely, transient synovitis may be confused with septic arthritis, which requires urgent treatment. Delayed diagnosis could lead to joint damage if mismanaged.

Lifestyle & Prevention

• Avoid overexertion or repetitive stress on the hip joint.
• Promptly address viral infections or minor injuries to reduce risk.
• Maintain overall joint health through balanced activity and rest.

When to Seek Professional Help

Seek care if symptoms worsen, persist beyond a few weeks, or include high fever, severe pain, or inability to bear weight. These may indicate a more serious condition.

Tips for Medical Coders

Use M67.35 for transient synovitis specifically affecting the hip. Document clinical findings (e.g., unilateral hip pain, limping, effusion) and exclude septic arthritis or other causes to support accurate coding. Ensure specificity of the hip joint in the medical record.