Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PIC line in the left arm extends into the proximal SVC . A right hilar mass is better assessed on prior CT . There is stable enlargement of the cardiac silhouette , which is likely secondary to known pericardial effusion seen on prior CT . No pleural effusion or definite signs of pneumonia or pneumothorax . Bony structures are intact .
    OUTPUT:
    
Stable cardiomegaly which could reflect known pericardial effusion , better assessed on prior CT , with hilar mass , also better assessed previously . No definite signs of superimposed pneumonia .