Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable chest radiograph was provided . There is left basal / retrocardiac opacity which could represent pneumonia with associated effusion . The right CP angle is excluded . Otherwise , the lungs appear clear . Cardiomediastinal silhouette is normal . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Left basal opacity suggestive of pneumonic consolidation and associated pleural effusion .