Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Similar to somewhat increased opacification of the left lung base reflecting parenchymal opacification with a pleural effusion . Differential considerations include scarring or atelectasis , but pneumonia is hard to exclude . The cardiac , mediastinal and hilar contours appear unchanged . A Port -a - Cath terminates at the lower superior vena cava before .
    OUTPUT:
    
Similar to increased left basilar opacification , probably reflecting pleural effusion and atelectasis , although findings are not entirely specific .