Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left chest wall pacemaker generator and leads are unchanged . The lungs are clear . The cardiac , hilar and mediastinal contours are stable , and the heart size is top normal . No pleural abnormality is seen .
    OUTPUT:
    
Mild cardiomegaly with no evidence of pulmonary edema , or metastatic disease .