M05.142

Clinical Causes: Autoimmune response: The body's immune system mistakenly attacks its own tissues, including the joints and lungs. Genetic factors: Certain genetic predispositions can increase susceptibility to RA and related lung complications. Environmental triggers: Smoking and exposure to certain environmental toxins may increase the risk of developing RA and lung involvement. Persistent joint inflammation: Chronic inflammation from RA can extend beyond joints, leading to systemic effects such as lung disease.

Key Symptoms: Persistent cough, which may be dry or produce sputum Shortness of breath, especially during exertion Chest discomfort or pain Fatigue and general weakness Joint pain and swelling, particularly in the left hand Reduced mobility or stiffness in the affected joints

Diagnosis Path: Chest X-ray and high-resolution CT scans to visualize lung tissue and identify inflammation or fibrosis Pulmonary function tests to assess lung capacity and airflow limitations Blood tests for markers of inflammation, such as ESR and CRP, and rheumatoid factor (RF) or anti-CCP antibodies Joint examination focusing on the left hand to evaluate RA severity Biopsy procedures in certain cases to confirm lung tissue involvement

Treatment Protocols: Disease-modifying antirheumatic drugs (DMARDs): Such as methotrexate and leflunomide, to slow joint and systemic inflammation Biologic therapies: Targeted medications like TNF inhibitors (e.g., etanercept, infliximab) to modulate the immune response Corticosteroids: To reduce acute inflammation in lungs and joints, used cautiously due to potential side effects Lung-specific treatments: Such as supplemental oxygen or pulmonary rehabilitation for respiratory support Physical therapy: To improve joint function in the affected hand and maintain mobility Lifestyle modifications: Including smoking cessation and avoiding environmental pollutants