Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . There is again a subtle left basilar opacity seen in the retrocardiac region posteriorly . The right lung opacity has cleared . The heart is mildly enlarged . Hilar contours and pleural surfaces are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle area of increased opacity in the left lower lobe which may reflect a clearing consolidation .