Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The appearance of Port - A - Cath is unchanged . Again seen are the surgical chain sutures in the right lower hemithorax . In the past there has been opacity in this area , on today 's study that opacity is slightly increased . It is unclear if this is volume loss or infiltrate . Pleural scarring is again seen on the right . The left lung is clear .
    OUTPUT:
    
Increased opacity in the region of prior surgery , unclear if this is volume loss or infiltrate .