Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Large retrocardiac air - fluid level is most consistent with a hiatal hernia . There is adjacent atelectasis . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The patient is rotated slightly to the right . The aorta is somewhat tortuous . There is prominence of the main pulmonary artery , which may be due to component of pulmonary arterial hypertension . The cardiac silhouette is top normal .
    OUTPUT:
    
Large hiatal hernia . Prominence of the main pulmonary artery may suggest a component of pulmonary hypertension .