Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lungs are well expanded . Bilateral reticular nodular opacity similar to the prior examination . Calcification in the hila may reflect sarcoidosis , unchanged from the prior examination . The cardiac , mediastinal and hilar contours are unchanged from the prior examination . There is no evidence of pleural effusion or pneumothorax . There is a small 7 - mm rounded opacity in the left upper lung , new since ___ , 2 days prior .
    OUTPUT:
    
1 . No acute focal consolidation . 2 . 7 - mm rounded opacity in the left upper lung new since 2 days prior and may be focus of infection ; attention to this region on follow up imaging .