Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The previously seen left pleural effusion is slightly decreased in size compared to ___ and either represents pleural effusion or pleural thickening . Lungs are clear without consolidation . No pneumothorax . Cardiac , mediastinal and hilar contours are normal .
    OUTPUT:
    
Tiny left pleural effusion or pleural thickening is decreased in size compared to ___ .