Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . Lungs are hyperexpanded . Increased left base and retrocardia opacities could represent an early infectious process in the appropriate clinical setting . There is 16 mm rounded opacity at the right lung base , for which further evaluation is recommended with a non urgent chest CT . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
1 . Increased left base and retrocardiac opacities could reflect pneumonia in the appropriate clinical setting . Short interval follow up is recommended after treatment to document resolution . 2 . 16 mm rounded opacity at the right lung base , for which further evaluation is recommended with a non urgent chest CT .