Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a right upper lobe mass , unchanged , and consistent with known lung carcinoma . A patchy opacity is seen on the lateral view , posteriorly , which is unchanged since recent examination , and in the appropriate clinical context , may represent pneumonia . No definite corresponding abnormalities are seen on the frontal radiograph . The cardiomediastinal silhouette and pulmonary vasculature are unremarkable . No definite pleural effusion is identified .
    OUTPUT:
    
Largely unchanged examination of the chest since ___ aside from resolution of pleural effusion .