Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette and pulmonary vasculature are unchanged since prior examination . Again noted is a mass in the right lower lobe . In comparison to the prior examination , however , there is increased opacity in this region . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Right lower lobe mass with increased right lower lung opacity . Superimposed atalectasis or pneumonia is not excluded .