Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is interval development of marked mediastinal widening consistent with clinical history of hematoma . Previously noted mediastinal gas is no longer seen . The cardiac silhouette remains normal in size . There is no large pleural effusion . Bilateral infrahilar opacity is new and may reflect atelectasis , or aspiration . A right hilar mass is again noted . The pulmonary vasculature is normal .
    OUTPUT:
    
1 . Marked interval mediastinal widening , consistent with hematoma . 2 . Bilateral infrahilar airspace opacity , atelectasis versus aspiration . 3 . Right hilar mass , unchanged . Findings were discussed with Dr . ___ at 3 pm by phone .