Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Inspiratory volumes are slightly low . The heart is not enlarged . The cardiomediastinal silhouette is unchanged compared with ___ . Mild upper zone redistribution , without overt CHF . No focal infiltrate or effusion is detected . The left anterior seventh rib has an unusual configuration , in that the superior border / cortex is indistinct , new compared with ___ . Other visualized ribs are within normal limits . Mild degenerative changes of the thoracic spine are noted .
    OUTPUT:
    
1 . No acute pulmonary process . In particular , no pneumonic infiltrate identified . 2 . Unusual appearance to the anterior left seventh rib , with indistinctness of the superior border of the rib . While this may represent an unusual artifact , it raises the possibility of a lytic area in the rib . Correlation with physical exam to assess for any focal tenderness or mass in this location is requested .