Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lung volumes are somewhat low limiting assessment . There is a large retrocardiac opacity containing an air - fluid level consistent with large hiatal hernia . Coarsened interstitial markings which are more pronounced along the periphery of the lungs likely reflecting interstitial lung disease . No large effusion or pneumothorax . Heart size appears grossly within normal limits the difficult to assess given large hiatal hernia . Mediastinal contour appears normal . The imaged bony structures are intact . Surgical anchors are seen imbedded in the left humeral head .
    OUTPUT:
    
Large hiatal hernia . Coarsened interstitial markings concerning for interstitial lung disease .