Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged . The mediastinal contour remains unchanged . Left upper lobe rounded opacity remains unchanged , previously characterized as an area of radiation fibrosis with probable recurrent tumor . Left perihilar mass appears similar compared to the previous exams with associated left hilar lymphadenopathy . Again demonstrated is a small to moderate pleural effusion which is partially loculated towards the apex , not substantially changed in the interval with continued left basilar chest tube in place . No pneumothorax is detected . Small right pleural effusion is a little changed in the interval . Increased interstitial opacities bilaterally , most pronounced at the bases may reflect mild pulmonary edema and / or lymphangitic spread of tumor . Persistent retrocardiac opacity could reflect atelectasis or infection . Mild S - shaped scoliosis of the thoracic spine is re - demonstrated . Fusion hardware within the lumbar spine is incompletely imaged .
    OUTPUT:
    
1 . Overall little interval change in the appearance of the chest compared to the recent radiographic exam . 2 . Persistent left upper lobe rounded opacity a reflective of radiation fibrosis with probable recurrent tumor . 3 . Continued left perihilar opacity compatible with malignancy . 4 . Persistent interstitial opacities within the lung bases may reflect mild pulmonary edema but lymphangitic carcinomatosis remains in the differential . 5 . Small to moderate partially loculated left pleural effusion and trace right pleural effusions , unchanged with left basilar chest tube in place . 6 . Retrocardiac opacity may reflect atelectasis but infection is not excluded .