M86.13

Clinical Causes: Bacterial infections, most commonly Staphylococcus aureus, invading the bone tissue Spread from nearby infected tissues or skin wounds Extension from systemic infections with bacteria traveling through the bloodstream Injury or fracture that creates an entry point for bacteria Complications from surgical procedures involving the forearm bones

Key Symptoms: Sudden and severe pain in the forearm, especially around the radius and ulna Swelling and tenderness over the affected bones Redness and warmth in the overlying skin Limited movement in the wrist or forearm due to pain and swelling Fever and chills indicating systemic infection Loss of function or weakness in the affected arm

Diagnosis Path: Diagnosing acute osteomyelitis involves a combination of clinical examination and imaging tests. Healthcare providers may perform the following assessments: - **Medical History and Physical Exam:** Identifying recent injuries, infections, or procedures involving the forearm. - **Blood Tests:** Checking for elevated white blood cell count and markers of inflammation. - **Imaging Studies:** X-rays can show bone changes, although early signs may be subtle. MRI is more sensitive and provides detailed images of bone and surrounding tissues. - **Bone Biopsy:** In some cases, extracting a small sample of bone tissue helps identify the infecting bacteria and guides antibiotic therapy.

Treatment Protocols: Managing acute osteomyelitis of the radius and ulna typically involves a multidisciplinary approach: - **Antibiotic Therapy:** Intravenous antibiotics are administered to eliminate the infection. The choice of antibiotics depends on the bacteria identified and their sensitivity. - **Surgical Intervention:** In cases with abscess formation, dead bone tissue (sequestrum), or failure of antibiotics alone, surgery may be necessary to remove infected tissue and drain pus. - **Immobilization:** Splinting or casting of the forearm to reduce pain and prevent further damage. - **Pain Management:** Analgesics are provided to relieve discomfort. - **Monitoring and Follow-up:** Regular assessments to ensure infection resolution and prevent recurrence. Early intervention improves outcomes, reducing the risk of chronic infection, bone deformity, or loss of function.