Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided PICC terminates in the mid to distal SVC . The endotracheal tube and nasogastric tube are unchanged in appearance compared to the prior study . Increased opacification of the left lung base likely reflects a combination of pleural effusion and atelectasis . This is unchanged in appearance compared to the prior study . No other areas of airspace opacity are appreciated , no pneumothorax seen . Degenerative changes throughout thoracic spine . No free air seen under the diaphragm .
    OUTPUT:
    
Left lower lobe atelectasis . And pleural effusion , superimposed infection can not be excluded . Appearances are unchanged compared to the prior study .