M61.01 Myositis ossificans traumatica, shoulder

Name of the Condition

• Myositis Ossificans Traumatica, Shoulder

Summary

Myositis ossificans traumatica of the shoulder is a condition marked by abnormal bone formation within the shoulder muscle tissue, typically following trauma. This process results in a hard, painful mass that can limit shoulder movement and cause discomfort.

Causes

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

Risk Factors

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

Symptoms

• Pain and tenderness at the shoulder injury site
• Swelling and inflammation in the shoulder
• A palpable, firm mass within the shoulder muscle
• Reduced range of motion or stiffness in the shoulder
• 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 in the shoulder. Biopsies are rarely needed but may be considered to rule out other conditions.

Treatment Options

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

Prognosis and Follow-Up

Prognosis depends on the extent of the ossification and adherence to treatment. Most cases improve with conservative management, but some may require ongoing physical therapy or surgical intervention. Regular follow-up is important to monitor healing and address any recurrence.

Complications

• Persistent pain or stiffness in the shoulder
• Limited range of motion leading to functional impairment
• Recurrence of ossification
• Nerve compression if the mass affects nearby structures

Lifestyle & Prevention

• Use proper protective gear during sports or high-risk activities
• Avoid overexertion or repetitive stress to the shoulder
• Seek prompt treatment for shoulder injuries to reduce complication risk
• Engage in regular, gentle shoulder exercises to maintain mobility

When to Seek Professional Help

Consult a healthcare provider if you experience severe or worsening shoulder pain, significant swelling, loss of motion, or if symptoms do not improve with rest and over-the-counter pain relievers.

Tips for Medical Coders

Document the specific shoulder involvement (e.g., left, right, or unspecified) and any associated trauma or surgical history. Ensure the diagnosis aligns with clinical findings and imaging results to support accurate coding.