Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is enlargement of the cardiac silhouette . Rounded retrocardiac density may be related to hiatal hernia ; however , the evaluation is limited . There is a moderate - sized left - sided pleural effusion with adjacent atelectasis . There is no convincing evidence of pneumonia . Engorgement of the bronchovascular structures , particularly in the right hila are likely related to low lung volumes rather than frank edema , although given the patient 's marked cardiomegaly , correlation with BNP if the patient has signs of heart failure would be helpful .
    OUTPUT:
    
1 . Moderate left - sided pleural effusion with adjacent atelectasis . 2 . Cardiomegaly with crowding of the bronchovascular structures which may be related to low lung volumes versus asymmetric pulmonary edema . 3 . Rounded retrocardiac density likely relates hiatal hernia . Correlate on pending CT .