Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest was obtained . Single - lead left - sided pacemaker is seen with lead extending to the expected position of the right ventricle . There is left base opacity and obscuration of the left hemidiaphragm which may be due to atelectasis and underlying consolidation , trace left pleural effusion may be present . The right lung is clear and relatively hyperinflated . The cardiac silhouette is enlarged . The aortic knob is calcified . Surgical clips are seen in the right upper quadrant .
    OUTPUT:
    
Left base opacity may be due to combination of atelectasis and trace pleural effusion versus consolidation due to infection . Enlarged cardiac silhouette .