Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . There is ill - defined opacity involving the right upper lobe in a similar pattern and distribution compared with the CT from ___ . There is no definite sign of a new consolidation , effusion . Left lung remains clear . Overall , cardiomediastinal silhouette appears grossly stable . Bony structures are intact .
    OUTPUT:
    
Stable appearance of right upper lobe opacity compatible with known malignancy . No definite signs of superimposed pneumonia .