Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left hemidiaphragm elevation is unchanged . The cardiac silhouette is enlarged , and accounting for differences in technique is larger than CT ___ . There is widening of the mediastinal silhouette obscuring portions of the the aortic shadow secondary to known mediastinal mass . There is no pneumothorax . There is no area of consolidation .
    OUTPUT:
    
1 . Enlarged cardiac silhouette compared to CT ___ . Given the presence of pericardial effusion on prior CT , enlarging pericardial should be considered . Correlate for cardiac tamponade . 2 . Widened mediastinal silhouette consistent with known mediastinal mass .