M93.023 Chronic slipped upper femoral epiphysis (nontraumatic), unspecified hip

Name of the Condition

• Chronic slipped upper femoral epiphysis (nontraumatic), unspecified hip

Summary

Chronic slipped upper femoral epiphysis (SUFE) is a condition where the femoral head (ball of the hip joint) gradually slips from its normal position on the femoral neck due to a fracture through the growth plate. This nontraumatic form develops over time without a specific injury and typically affects adolescents during growth spurts. The condition can lead to persistent hip pain, gait abnormalities, and reduced mobility if left untreated.

Causes

The exact cause of chronic nontraumatic SUFE is not fully understood, but it is associated with mechanical stress on the growth plate during rapid growth. Hormonal changes, particularly those affecting growth plate stability, may contribute. Obesity is a key factor due to increased mechanical load on the hip, which can weaken the growth plate over time. The chronic nature suggests a slow, progressive displacement rather than a sudden event.

Risk Factors

• Age: Most common in adolescents aged 10-16 years, especially during growth spurts.
• Gender: Males are more frequently affected than females.
• Obesity: Higher body weight increases stress on the hip joint.
• Endocrine disorders: Conditions like hypothyroidism or growth hormone abnormalities may elevate risk.
• Family history: A genetic predisposition may play a role.

Symptoms

• Hip, thigh, or knee pain (pain may be referred to the knee).
• Limp or altered gait (e.g., walking with a limp or toe-out stance).
• Reduced range of motion in the hip, especially internal rotation.
• External rotation of the leg when flexed.
• Pain worsened by activity or weight-bearing.

Diagnosis

Diagnosis involves a physical exam to assess gait, hip range of motion, and pain patterns. Imaging studies, such as X-rays or MRI, are typically used to confirm the displacement of the femoral head. The chronic nature of the condition is determined by the gradual onset and lack of a specific traumatic event.

Treatment Options

Treatment depends on the severity of the slip and may include activity modification, weight management, and physical therapy. Surgical intervention, such as in situ pinning or realignment, is often recommended to stabilize the femoral head and prevent further displacement. Postoperative care focuses on gradual weight-bearing and rehabilitation.

Prognosis and Follow-Up

With appropriate treatment, most patients can achieve good functional outcomes. However, chronic SUFE may lead to long-term complications like osteoarthritis or avascular necrosis if not addressed promptly. Regular follow-up with imaging and clinical assessments is essential to monitor for progression or recurrence.

Complications

• Avascular necrosis of the femoral head.
• Premature osteoarthritis of the hip.
• Persistent gait abnormalities or leg length discrepancy.
• Reduced hip mobility or chronic pain.

Lifestyle & Prevention

Maintaining a healthy weight and engaging in low-impact activities can reduce stress on the hip joint. Early recognition of symptoms, such as hip or knee pain in adolescents, is critical for timely intervention. Regular physical activity and balanced nutrition support overall musculoskeletal health during growth spurts.

When to Seek Professional Help

Seek medical attention if an adolescent experiences persistent hip, thigh, or knee pain, limping, or difficulty bearing weight. Prompt evaluation is necessary to prevent complications and ensure appropriate management.

Tips for Medical Coders

Document the chronic nature of the condition and the unspecified hip site. Include details about the gradual onset, lack of trauma, and any contributing factors (e.g., obesity, endocrine disorders) to support the diagnosis. Ensure the code M93.023 is used when the hip is not specified as left or right.