Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a hazy , heterogeneous opacity in the right lower lobe which may represent infection , tumor infiltration , atelectasis , or a combination of all three . Widening of the mediastinum is caused by the patient 's known malignancy . The left lung and upper right lung are mostly clear . There is no pneumothorax . A right pleural effusion is undoubtedly present .
    OUTPUT:
    
Right lower lobe opacity is likely a combination of tumor infiltration , atelectasis , and infection can not be rule out . This area will be further evaluated on the subsequent CT angiogram .