Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the superior vena cava . The cardiac , mediastinal and hilar contours appear stable . Lung volumes are low . There are persistent small pleural effusions , greater on the left than right , not significantly changed . There is associated posterior basilar opacity which is somewhat increased but probably due to atelectasis .
    OUTPUT:
    
Mild increase in left posterior basilar opacity , probably compatible with atelectasis , associated with a pleural effusion although infectious etiology is not excluded by this examination . Stable small pleural effusions .