M85.511 Aneurysmal bone cyst, right shoulder

ICD10CM code

#### Name of the Condition
- Aneurysmal Bone Cyst, Right Shoulder (ICD Code: M85.511)

#### Summary
- An aneurysmal bone cyst (ABC) is a benign, blood-filled bone tumor that typically affects the long bones of the body, such as the shoulder. Although not cancerous, it can cause the bone to become weak and swollen.

#### Causes
- The exact cause of ABCs is not well understood. They may occur spontaneously or as a result of previous injury or trauma. Recent theories suggest a genetic component or vascular malformation.

#### Risk Factors
- Most commonly affects children and adolescents.
- Slightly more prevalent in females.
- Previous bone injuries or conditions may predispose individuals to develop an ABC.

#### Symptoms
- Pain in the affected shoulder.
- Swelling or a visible lump on the shoulder.
- Decreased range of motion.
- Possible pathological fractures due to bone weakening.

#### Diagnosis
- X-rays or MRI scans to visualize the cyst and assess its impact on the bone.
- Biopsy to confirm diagnosis and rule out malignancy.

#### Treatment Options
- Curettage and bone grafting, where the cyst is scraped out and the cavity is filled with bone graft material.
- Sclerotherapy involves injecting a solution to shrink the cyst.
- In severe cases, surgical resection of the affected bone segment may be necessary.

#### Prognosis and Follow-Up
- With appropriate treatment, most patients achieve full recovery.
- Regular follow-up is critical as there is a risk of recurrence, especially if not completely removed.

#### Complications
- Fractures of the affected bone.
- Recurrence of the cyst after treatment.
- Potential growth disturbances in pediatric cases if the growth plate is affected.

#### Lifestyle & Prevention
- Maintaining bone health through a balanced diet rich in calcium and vitamin D.
- Regular exercise to strengthen surrounding muscles.
- There are no known preventive measures as the exact cause is not clear.

#### When to Seek Professional Help
- Persistent pain or swelling in the shoulder.
- Decreased mobility or function of the shoulder joint.
- Sudden exacerbation of symptoms indicating possible fracture.

#### Additional Resources
- American Academy of Orthopaedic Surgeons (AAOS): [aaos.org](https://www.aaos.org/)
- Bone Cancer Research Trust: [bcrt.org.uk](https://www.bcrt.org.uk/)

#### Tips for Medical Coders
- Verify the anatomical site (right shoulder) to apply the correct ICD code M85.511.
- Ensure documentation specifies the condition as an aneurysmal bone cyst for accurate coding.
- Be aware of bilateral conditions; use separate codes if both shoulders are affected.

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