Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior radiograph , there has been interval placement of a endotracheal tube that terminates 2 .7 cm above the carina . Enteric tube has been removed . Aortic stent is unchanged in position . There is the right lung base opacity , which may be due to pleural effusion and / or atelectasis , but pneumonia should be considered in the appropriate clinical setting . Curvilinear opacity along the medial aspect of the right upper hemithorax represents wall of the persistently dilated esophagus . Left lung is essentially clear . No pneumothorax . Stable mild cardiomegaly .
    OUTPUT:
    
1 . Interval placement of an endotracheal tube , which terminates 2 .7 cm above the carina . 2 . Persistent right lung base opacity , which may be due to pleural effusion and / or atelectasis . Consider pneumonia in the appropriate clinical setting .