Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided Port - A - Cath tip terminates in the mid SVC . There has been substantial interval enlargement of the right pleural effusion which is now large with associated right basilar atelectasis . Left lung is grossly clear . There may be a trace left pleural effusion . Heart size is difficult to assess given the presence of the large right pleural effusion . Mediastinal contours are unremarkable . There is no pulmonary edema . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Substantial interval increase in size of the right pleural effusion , now large , with right basilar atelectasis .