M87.01 Idiopathic aseptic necrosis of shoulder

Name of the Condition

• Idiopathic Aseptic Necrosis of Shoulder
• Also known as Avascular Necrosis of the Shoulder

Summary

Idiopathic aseptic necrosis of the shoulder is a condition where reduced blood supply causes bone tissue in the shoulder to die, potentially leading to pain, joint damage, and loss of function. The term "idiopathic" indicates the specific cause of the blood supply disruption is unknown.

Causes

The exact cause is unknown, but the condition results from insufficient blood flow to the shoulder bone. This disruption may stem from non-traumatic factors, though the precise mechanism remains unclear in idiopathic cases.

Risk Factors

• Prolonged corticosteroid use
• Excessive alcohol consumption
• Trauma or injury to the shoulder
• Blood disorders (e.g., sickle cell disease)
• Certain medical conditions (e.g., lupus, Gaucher disease)
• Radiation therapy near the shoulder

Symptoms

• Pain in the shoulder, often worsening with activity
• Limited range of motion or stiffness
• Swelling or tenderness in the affected area
• Weakness or instability in the shoulder joint

Diagnosis

Diagnosis involves clinical evaluation and imaging. X-rays may show late-stage bone changes, while MRI or CT scans detect early damage. Bone scans can assess blood flow to the shoulder.

Treatment Options

• Medications: Pain relievers, anti-inflammatories, or medications to manage underlying conditions
• Physical therapy: To preserve joint function and mobility
• Surgical options: Core decompression, osteotomy, or joint replacement in advanced cases

Prognosis and Follow-Up

Prognosis depends on the stage of the condition and treatment. Early intervention may slow progression, but advanced cases can lead to joint collapse. Regular follow-up with imaging and clinical assessments is typically recommended.

Complications

• Joint collapse or deformity
• Chronic pain and disability
• Osteoarthritis in the affected shoulder
• Reduced quality of life due to functional limitations

Lifestyle & Prevention

• Avoid excessive alcohol consumption
• Use corticosteroids only as prescribed and monitor for side effects
• Protect the shoulder from injury during physical activity
• Maintain overall bone health through balanced nutrition and exercise

When to Seek Professional Help

Seek medical attention if you experience persistent shoulder pain, sudden loss of motion, or worsening symptoms. Early evaluation can help manage the condition and prevent complications.

Tips for Medical Coders

Document the specific shoulder affected (e.g., left, right, bilateral) and any associated risk factors or underlying conditions. Ensure clinical notes support the diagnosis and specify the shoulder location for accurate coding.