Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patient is status post median sternotomy and CABG . There is a small left pleural effusion with overlying atelectasis . Slight blunting of the right costophrenic angle is seen and there may be a trace right pleural effusion . Medial left basilar retrocardiac opacity may be due to combination of pleural effusion and atelectasis ; however , consolidation is not excluded . No overt pulmonary edema is seen .
    OUTPUT:
    
Small left pleural effusion with overlying atelectasis . Possible trace right pleural effusion . Left basilar retrocardiac opacity may be due to combination of atelectasis and pleural effusion , although consolidation is not excluded in the appropriate clinical setting .