Pulmonary involvement in rheumatoid arthritis.

Area of Science:

• Rheumatology
• Pulmonology
• Radiology

Background:

• Rheumatoid arthritis (RA) is a systemic autoimmune disease with potential for extra-articular manifestations.
• Pulmonary involvement is a significant comorbidity in RA, impacting patient prognosis and quality of life.

Purpose of the Study:

• To investigate the associations between clinical features, lung involvement, and pulmonary function in rheumatoid arthritis patients.
• To identify predictors of lung involvement in RA using imaging and clinical data.

Main Methods:

• Prospective evaluation of 52 RA patients (44 female, mean age 53.6 years).
• High-resolution computed tomography (HRCT) for lung imaging.
• Pulmonary function tests (PFTs) to assess lung capacity and function.
• Assessment of rheumatoid factor (RF) titers and erythrocyte sedimentation rate (ESR).

Main Results:

• HRCT revealed abnormalities in 67.3% of patients, with reticulonodular patterns being most common (62.9%).
• Pulmonary function tests were normal in 37% of patients despite HRCT findings.
• Higher RF titers and ESR correlated with abnormal HRCT findings.
• Advanced age, severe RA disease, and higher Larsen's score were significant predictors of lung involvement (p<0.001, p<0.01, p<0.01).

Conclusions:

• Lung involvement is prevalent in RA patients, often detected by HRCT.
• Clinical indicators such as disease severity, age, and radiographic joint damage (Larsen's score) are significant predictors of pulmonary complications in RA.
• Routine screening for pulmonary involvement in RA patients with these risk factors may be warranted.