Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is moderately enlarged . Mediastinal contours unremarkable . Hyperinflation of the lungs is suggestive of underlying chronic obstructive pulmonary disease . Large left pleural effusion is noted with retrocardiac opacity likely reflective of atelectasis . Infection is not excluded . No pneumothorax is noted . Mild pulmonary vascular congestion may be present . The right lung is grossly clear . No acute osseous abnormalities seen . Multiple left axillary clips are demonstrated .
    OUTPUT:
    
Large left pleural effusion with left basilar opacity likely reflective of atelectasis though infection is not excluded . Probable mild pulmonary vascular congestion .