Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Complex rounded mass in left lower lobe posteriorly is associated with multiple cystic lucencies inferiorly , and a persistent crescenteric lucency surrounding the majority of the lesion . As compared to the prior study , multicystic basilar component of the lesion demonstrates increasing extent of air - fluid levels , and there may be an adjacent new area of consolidation laterally . Lungs are otherwise clear , and cardiomediastinal contours are stable .
    OUTPUT:
    
Increased extent of air - fluid levels within multicystic component of left lower lobe sequestration , concerning for complication by infection and / or hemorrhage . Consider a chest CTA for more complete evaluation as entered in the radiology communications dashboard on the date of the study .