Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest redemonstrates low tip position of left PICC with tip likely in the upper right atrium , but similar as compared to prior exam . The heart is normal in size . The mediastinal and hilar contours are within normal limits . There is new pleural effusion and retrocardiac consolidation , which could represent atelectasis and / or consolidation , certainly could represent pneumonia in the appropriate clinical setting . The upper left lung and right lung are well aerated . There is no pneumothorax , florid pulmonary edema , or right pleural effusion .
    OUTPUT:
    
New left pleural effusion with basal atelectasis and / or consolidation , in the appropriate clinical setting could represent pneumonia .