Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart appears mildly enlarged . There is mild unfolding of the thoracic aorta . The pulmonary interstitium is mildly coarse which is nonspecific and may reflect airway inflammation , slight congestion or mild interstitial disease . The lateral view depicts a large oval density projecting over the middle to posterior mediastinum , possibly a large hiatal hernia although there is no air-fluid level to confirm , and probably centered to the right of midline . Blunting of the right costophrenic sulcus may suggest a small pleural effusion or potentially chronic scarring . The right acromiohumeral interval is completely effaced with mild - to - moderate degenerative change , suggestive of rotator cuff pathology . The bones appear demineralized .
    OUTPUT:
    
Large density projecting along the lower posterior chest on the lateral view , probably to the right of midline . Although a hiatal hernia with associated atelectasis or scarring could be considered , it is not possible to exclude a mass or consolidation . Comparison to prior radiographs may be helpful if clinically appropriate . A chest CT is suggested to evaluate further when clinically appropriate .