M61.011 Myositis ossificans traumatica, right shoulder

Name of the Condition

• Myositis Ossificans Traumatica, Right Shoulder

Summary

Myositis ossificans traumatica is a condition characterized by the abnormal formation of bone within muscle tissue, typically following trauma. This process leads to the development of a hard, painful mass that can restrict movement and cause discomfort in the affected area, such as the right shoulder.

Causes

The condition is primarily caused by direct trauma to muscle, such as a contusion or injury. It may also result from surgical procedures or repetitive stress to the affected area.

Risk Factors

• History of muscle trauma or injury
• Participation in contact sports or high-impact activities
• Surgical intervention involving muscle tissue
• Delayed or inadequate treatment of initial injury

Symptoms

• Pain and tenderness at the injury site
• Swelling and inflammation
• A palpable, firm mass within the muscle
• Reduced range of motion or stiffness
• Possible fever or warmth in the area

Diagnosis

Diagnosis is based on clinical evaluation and imaging studies, such as X-rays, CT scans, or MRI, which can visualize the characteristic calcified or ossified lesion. Biopsies are rarely needed but may be considered to rule out other conditions.

Treatment Options

• Rest and immobilization to reduce further injury
• Nonsteroidal anti-inflammatory drugs (NSAIDs) to manage pain and inflammation
• Physical therapy to restore mobility and strength
• Surgical intervention in severe or persistent cases

Prognosis and Follow-Up

Prognosis depends on the extent of the condition and adherence to treatment. Most cases resolve with appropriate management, but some may require ongoing monitoring to prevent recurrence or complications. Follow-up imaging may be used to assess healing.

Complications

• Chronic pain or stiffness
• Persistent reduced range of motion
• Recurrence of bone formation
• Nerve compression in severe cases

Lifestyle & Prevention

• Avoid activities that risk shoulder injury
• Use proper protective gear during sports
• Seek prompt treatment for muscle injuries
• Maintain regular physical activity to support muscle health

When to Seek Professional Help

Consult a healthcare provider if you experience persistent pain, swelling, or reduced mobility in the shoulder after trauma, or if symptoms worsen despite home care.

Tips for Medical Coders

Document the specific site (right shoulder) and confirm the traumatic etiology to support accurate coding. Ensure clinical notes align with the diagnosis and include details of trauma or injury to justify the code assignment.