Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar silhouettes remain stable . There are bilateral upper lung reticular and nodular opacities with associated volume loss , stable compared to the prior study . The lungs are otherwise clear with no focal consolidation . There is no pleural effusion , pulmonary edema , or pneumothorax . The osseous structures are unremarkable .
    OUTPUT:
    
1 . No focal consolidation to suggest pneumonia . 2 . Stable bilateral upper lung zone fibrosis consistent with history of sarcoidosis .