Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A Port - A - Cath appears unchanged , again terminating in the right atrium . The heart is mild to moderately enlarged . The mediastinal and hilar contours appear unchanged . There is no pleural effusion or pneumothorax . The lungs show streaky basilar opacities that are nonspecific and could be seen with minor atelectasis , depicted only on the frontal view . There are most prominent in the retrocardiac region but are not extensive . Moderate degenerative changes are similar along the thoracic spine .
    OUTPUT:
    
Patchy basilar opacities , including along bronchovascular structures in the retrocardiac area , which are probably compatible with atelectasis although early bronchopneumonia is possible .