Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A round retrocardiac opacity with an air fluid level abutting the left paravertebral stripe is a hiatal hernia . No other focal opacities are noted . Cardiomnediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax .
    OUTPUT:
    
Hiatal hernia . Otherwise , unremarkable chest radiographic examination .