Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are relatively low lung volumes . Single - lead right - sided pacemaker is again seen , unchanged in position . The cardiomediastinal silhouette remains enlarged , likely grossly stable given differences in inspiration . There is mild prominence of the pulmonary vasculature suggesting mild interstitial edema . It is difficult to exclude a right small pleural effusion due to overlying soft tissue partially obscuring the right costophrenic angle . Deformity of the posterior right seventh rib is compatible with prior fracture .
    OUTPUT:
    
Persistent enlargement of the cardiomediastinal silhouette and minimal interstitial edema .