Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a large hiatal hernia . It s size is even increased somewhat , although this may be due to waxing and waning degree of aeration . The pulmonary vasculature appears indistinct , suggesting mild fluid overload . Streaky opacities at the medial lung bases are typical for atelectasis associated with a large hiatal hernia . It is difficult to exclude small pleural effusions , although none are explicitly demonstrated . Spinal curvature and moderate degenerative changes along the lower thoracic spine appears similar , but not completely characterized .
    OUTPUT:
    
1 . Large hiatal hernia , somewhat increased air bubble associated with it . 2 . Findings suggesting mild vascular congestion .