Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided dual lumen central venous catheter tip terminates in the mid and lower SVC . Heart size is mildly enlarged but unchanged . Mediastinal and hilar contours are within normal limits . Pulmonary vasculature is not engorged . Small bilateral pleural effusions are not substantially changed in the interval . Increased patchy opacities in the lung bases , vertically within the retrocardiac region are noted . No pneumothorax is present . A stent is seen overlying the region of the medial left upper quadrant of the abdomen .
    OUTPUT:
    
Unchanged small bilateral pleural effusions with worsening bibasilar airspace opacities , potentially atelectasis . Infection , however , can not be excluded .