Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Abandoned pacer leads projecting over the left lateral chest wall anteriorly appear unchanged . A single - lead pacemaker device terminates in the right ventricle , as before . Moderate globular cardiac enlargement is similar . The mediastinal and hilar contours appear unchanged . There is persistent left basilar opacification that may probably reflect a small - to - moderate effusion with increased opacification of the left lower lobe , which is nonspecific as to etiology . Although the opacity may consist of a combination of atelectasis and pleural effusion , a pneumonic consolidation is noted excluded . There is no pneumothorax or definite pleural effusion on the right side . Mild degenerative changes are similar along the thoracic spine . Cholecystectomy clips project over the right upper quadrant .
    OUTPUT:
    
Increasing opacification in the left lower lobe , which may primarily reflect an increase in pleural effusion but extensive atelectasis or pneumonic consolidation are additional possibilities to consider .