Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: THE LUNGS ARE HYPERINFLATED - BEST SEEN ON LATERAL VIEW - BUT CLEAR OF ANY FOCAL ABNORMALITY OR EDEMA . IN THE ABSENCE OF FINDINGS OF ACUTE CARDIAC DECOMPENSATION , THE PROGRESSIVE ENLARGEMENT SINCE ___ OF THE ALREADY ENLARGED CARDIAC SILHOUETTE COULD BE DUE TO PERICARDIAL EFFUSION . THERE IS NO MEDIASTINAL WIDENING TO SUGGEST ELEVATED CENTRAL VENOUS PRESSURE , WHICH WOULD BE EXPECTED WITH CARDIAC TAMPONADE . The pleural surfaces are stable .
    OUTPUT:
    
1 . POSSIBLE PERICARDIAL EFFUSION . NO RADIOGRAPHIC EVIDENCE OF TAMPONADE PHYSIOLOGY . NO INDICATION OF ACUTE CARDIAC DECOMPENSATION . 2 . No evidence of pneumonia .