Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is not enlarged . Within the limits of plain film radiography , no hilar or mediastinal lymphadenopathy is detected . No CHF , focal infiltrate or gross effusion is identified . There is slight blunting of the right and left costophrenic angles both laterally and posteriorly . The upper edge of the right lung at the right lung apex is visualized -- by doubt , but can not entirely exclude a tiny right pneumothorax , though reported symptoms are not suggestive of fat . Alternatively , this could represent a chronic appearance due to chronic scarring . No free air seen beneath the diaphragm . The previously seen subdiaphragmatic free air ( ___ radiograph ) have resolved . Multiple clips are again noted in the left upper abdomen .
    OUTPUT:
    
1 . No focal infiltrate identified to suggest pneumonia . 2 . Minimal bilateral pleural fluid and / or thickening . 3 . Curvilinear lucency at the right lung apex . In the absence of relevant symptoms , this more likely represents a subtle change due to chronic scarring than a true tiny right apical pneumothorax .