Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are rule the patient is status post CABG . Mediastinal and cardiac silhouettes are similar compared to prior given technique . Left - sided PICC line is no longer present . There is blunting of the left CP angle compatible with small left effusion . Small infiltrate in this region can not be excluded . Otherwise lungs are clear .
    OUTPUT:
    
Possible small left effusion .