Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right - sided Port - A - Cath terminates in the mid to distal SVC . A right basal opacity likely reflects a combination of pleural fluid / thickening and atelectasis , this is unchanged compared to the prior study . Left lung appears grossly clear . The cardiomediastinal contour is unchanged in appearance . Multilevel degenerative changes noted in the thoracic spine . No pneumothorax seen .
    OUTPUT:
    
No significant interval change when compared to the prior study . Persistent right basal pleural effusion and atelectasis .