Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right chest wall pacemaker generator is in unchanged position . The patient is status post median sternotomy with wires intact . Surgical clips project over the pericardium . Extensive pulmonary fibrosis with basilar predominance and apparent honeycombing is again seen , however lung opacities at the right lung base are subtly increased in comparison to multiple prior examinations .
    OUTPUT:
    
Subtly increased opacities at the right lung base could potentially represent pneumonia in the appropriate clinical setting , but are difficult to differentiate from conglomerate fibrosis . If clinically indicated a CT may be useful for further evaluation .