Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is post right upper lobe resection . Large pleural based right apical opacity is new , occupying a space previously represented by aerated right middle lobe . No dependent pleural effusion is identified . Left lung is hyperexpanded but grossly clear .
    OUTPUT:
    
New right apical pleural based opacity may reflect a combination of loculated fluid and adjacent collapsed right middle lobe . Chest CT with contrast is recommended for further evaluation .