Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath terminates in the upper SVC without evidence of pneumothorax . Patient is status post median sternotomy . The cardiac and mediastinal silhouettes are grossly stable with the cardiac silhouette enlarged . No pleural effusion or pneumothorax is seen . Patchy retrocardiac opacity may be due to vascular structures , but consolidation due to pneumonia is not entirely excluded . Partially imaged cervical hardware is noted .
    OUTPUT:
    
Persistent cardiomegaly . Patchy retrocardiac opacity on the lateral view may be due to overlapping vascular structures but consolidation due to pneumonia is not entirely excluded in the appropriate clinical setting .