Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single AP upright frontal chest radiograph demonstrates asymmetric pulmonary edema greater on the right than the left . There is slightly increased opacification of the left lung base which obscures the left hemidiaphragm compared to the prior study and may represent a small left pleural effusion or atelectasis . In the appropriate clinical setting , underlying consolidation can not be excluded . The cardiac silhouette is enlarged but stable . The mediastinal and hilar contours are stable and within normal limits . Biliary drains are in place in the right upper quadrant of the abdomen . A device is also located in the abdomen , which may be external to the patient or alternatively may represent a nerve stimulator .
    OUTPUT:
    
1 . Asymmetric pulmonary edema . Increased opacity in the left lung base likely represents pleural effusion with atelectasis , but underlying consolidation can not be excluded in the appropriate clinical setting . 2 . Stable cardiomegaly .