Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . The cardiac and mediastinal silhouettes are stable . There is diffuse increase in interstitial markings bilaterally , concerning for moderate pulmonary edema versus atypical infection . No pleural effusion or pneumothorax is seen . Degenerative changes are seen at the acromioclavicular joints bilaterally .
    OUTPUT:
    
Diffuse increase in interstitial markings bilaterally , moderate pulmonary edema versus atypical infection .