Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . As seen on prior CT chest , there is a right lower lobe mass measuring approximately 2 .0 x 3 .6 cm , better characterized on prior CT . Otherwise the lungs appear clear without evidence of pneumonia . No effusion or pneumothorax is seen . The cardiomediastinal silhouette is normal . Bony structures are intact .
    OUTPUT:
    
Known mass projecting over the right lower lobe as on prior CT . No signs of superimposed pneumonia .