Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged with known mediastinal lymphadenopathy better assessed on prior CT . Pulmonary vasculature is not engorged . Left lower lobe mass is re - demonstrated , grossly unchanged compared to the recent CT . Subsegmental atelectasis in the left lower lobe is present . Remainder of the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Re - demonstration of left lower lobe mass and subsegmental left lower lobe atelectasis . No new focal consolidation .