Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A right internal jugular venous catheter has been removed . The patient is status post apparently mitral valve replacement . The heart is moderately enlarged . The mediastinal and hilar contours are similar . There is persistent fluid in the minor fissure , but somewhat decreased . A small quantity of fluid is similar in the right major fissure . However , there is a new suspected small pleural effusion on the left with patchy associated basilar opacity and there is also increased opacification at the right lung base . There is no overt congestive heart failure . There is no pneumothorax . Bony structures are unremarkable .
    OUTPUT:
    
New bibasilar opacification with a small new left - sided pleural effusion . These findings are not specific and could be seen with atelectasis but developing pulmonary infection is not excluded .