Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A ___ entire tube and left - sided PICC remain in stable position . The cardiac silhouette is unremarkable and unchanged . Again noted is a retrocardiac opacity and moderate left - sided pleural effusion , not significantly changed since recent examination . There is mild , stable pulmonary edema , also unchanged since most recent examination .
    OUTPUT:
    
1 . Left lower lobe atelectasis , superimposed infection can not be excluded . . 2 . Persistent left - sided pleural effusion , unchanged .