Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath terminates in the superior vena cava . The cardiac , mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . Evaluation is difficult due to coinciding opacity associated with the port site , but there is patchy perihilar opacity in the same general vicinity , while elsewhere , the lungs remain clear .
    OUTPUT:
    
Patchy opacity involving the right upper lobe , new since the remote prior study ; this may represent an area of scarring or prior treatment site but pneumonia is not excluded . If more recent prior radiographs are available done from ___ , direct comparison may be helpful .