Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided central venous catheter is seen with tip projecting over the right atrium . Surgical clips project right over the right hemidiaphragm . There is biapical fibrotic change present . There is vague nodular opacity seen at the right lung base that may reflect superimposed breast scar tissue . There is increased retrocardiac opacity concerning for pneiumonia . There is no evidence of pneumothorax or pleural effusions . There is slight cardiomegaly present . There is no evidence of pneumoperitoneum . Mild degenerative change is seen throughout the thoracic spine .
    OUTPUT:
    
Increased retrocarciac opacity concerning for pneumonia .