Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval reaccumulation of a small right - sided pleural effusion with adjacent atelectasis . There is no left - sided pleural effusion . Redemonstrated is an unchanged interstitial abnormality within the right upper lobe , compatible with the patient 's known lymphangitic spread of cancer , as per the prior chest CT examination . No new focal consolidation is identified . There is no pneumothorax or frank pulmonary edema . The heart size is normal . Mediastinal contours are normal .
    OUTPUT:
    
1 . Interval development of a small right pleural effusion . 2 . Unchanged right upper lobe interstitial abnormality , better evaluated on prior chest CT examination , and compatible with lymphangitic carcinomatosis .