Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to ___ chest radiograph , a peripheral region of consolidation in the left mid lung has worsened in the interval . Cardiomediastinal contours are stable . Right lung and pleural surfaces remain clear .
    OUTPUT:
    
Worsening peripheral left mid lung consolidation , for which the differential diagnosis includes infectious pneumonia , radiation pneumonitis ( the extent of radiographic abnormalities is greater than typically observed in the setting of breast cancer radiation therapy ) , organizing pneumonia , and less likely infarction .