Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided chest wall port is again seen . There is a persistent small right pleural effusion . Vague opacity on the lateral view in the retrocardiac region likely corresponds to known underlying mass lesion . It is not seen on the frontal likely due to rotation . The lungs are otherwise clear . Cardiac silhouette is within normal limits . Marked tortuosity of the thoracic aorta is unchanged . Known right hilar adenopathy is not clearly delineated due to rotation on the frontal view
    OUTPUT:
    
Persistent right pleural effusion without superimposed acute cardiopulmonary process . Known right lower lobe mass and perihilar adenopathy is not as clearly seen on today 's exam .