Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided pacemaker with its leads in the right atrium and right ventricle are unchanged . Mediastinal clips are stable . Sternal wires are intact . There is persistent opacification of the left mid-lower lung , likely reflecting due to pleural effusion and consolidation . Allowing for changes in technique , it appears similar to the prior radiograph . The left apex appears to be normally aerated . There is an increase in the intersitial markings , which may represent mild pulmonary edema . There is no right pleural effusion . There is no pneumothorax . The cardiac silhouette is difficult to evaluate due to the left - sided effusion .
    OUTPUT:
    
1 . Mild pulmonary edema . 2 . Large left pleural effusion and subjacent consolidation , similar to the prior exams .