Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are increased interstitial markings throughout the lungs , more conspicuous on today 's exam . There is no confluent consolidation or effusion . Cardiac silhouette is enlarged , similar compared to prior . Prosthetic aortic valve is identified . Left - sided central venous catheter is in stable position . Vascular stent projects over the right upper mediastinum .
    OUTPUT:
    
Increased interstitial markings throughout the lungs . This may be in part chronic however component of interstitial edema or atypical infection is possible . No confluent consolidation or effusion .