Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung volume is stable with chronic eventration of the hemidiaphragm . Interval decrease and left lung volume with development of a small left pleural effusion . No pulmonary edema . No pneumothorax . The heart is top - normal in size . The mediastinal and hilar contours are normal without dilation of the SVC or pulmonary veins . . Median sternotomy clips are intact . The left pacemaker is intact with leads terminating in the appropriate positions of right atrium and right ventricle .
    OUTPUT:
    
Interval development of small left pleural effusion . Otherwise no acute cardiopulmonary process .