Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrates a large left pleural effusion with adjacent atelectasis which is not significantly changed relative to prior study dated ___ . Imaged lungs are grossly clear without a focal consolidation worrisome for an infectious process . Streaky opacities within the left lung base likely reflects atelectasis . Cardiomediastinal and hilar contours appear grossly stable dose obscured by left pleural fluid .
    OUTPUT:
    
Overall stable appearance of the chest relative to prior study dated ___ with large left pleural effusion . No focal opacity convincing for pneumonia is identified although fluid somewhat limits evaluation .