Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided PICC is unchanged in position . Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . The perihilar area on the right appears denser than on the prior exam which could represent pneumonia . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Increased opacity at the right perihilar region , which could represent pneumonia .