Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates a left chest wall pacing device , its leads which appear intact in in unchanged position relative to most recent examination dated ___ . Cardiomediastinal and hilar contours are stable . There is a moderate - sized left pleural effusion as seen on recent exam . No focal opacity is identified convincing for pneumonia . No evidence of pulmonary edema . Imaged upper abdomen is without evidence of an acute abnormality .
    OUTPUT:
    
Moderate left pleural effusion as seen on recent exam . No focal opacity convincing for pneumonia .