Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: CARDIOMEDIASTINAL CONTOURS ARE STABLE . PATCHY AND LINEAR LEFT BASILAR OPACITIES HAVE SLIGHTLY WORSENED AND ARE ASSOCIATED WITH MILD VOLUME LOSS AND ADJACENT SMALL PLEURAL EFFUSION . PROBABLE SMALL RIGHT PLEURAL EFFUSION IS ALSO DEMONSTRATED . THE PATIENT IS STATUS POST PREVIOUS AORTIC STENT GRAFT AND MEDIAN STERNOTOMY AND CABG , WITH PERSISTENT DISRUPTION OF THE UPPER STERNAL WIRE .
    OUTPUT:
    
WORSENING LEFT LOWER LOBE OPACITY , MOST LIKELY ATELECTASIS , ALTHOUGH COEXISTING PNEUMONIA IS POSSIBLE IN THE APPROPRIATE CLINICAL SETTING .