Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large right pleural effusion has increased substantially from ___ , but was seen on the prior CT abdomen from ___ . There is associated right basilar atelectasis . Heart size is difficult to assess given the presence of the right pleural effusion . There is mild leftward shift of mediastinal structures as a result of the large right pleural effusion . Left lung is clear . There is no pulmonary vascular engorgement . No pneumothorax is seen . No acute osseous abnormalities are detected .
    OUTPUT:
    
Large right pleural effusion , increased from ___ with associated right basilar atelectasis .