Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are normal . Left hilar fullness is noted , which corresponds to known left juxtahilar mass with lingular collapse . There is no pneumothorax or pleural effusion . The lungs are well - expanded . Postoperative changes after right upper lobectomy are noted , including pleural parenchymal opacities at the right base . There is improved aeration at the left lung base . There is no evidence of focal consolidation concerning for pneumonia . The upper abdomen is unremarkable .
    OUTPUT:
    
Improved aeration at the left lung base . Unchanged findings relating to known malignancy in the left lung and postoperative changes in the right lung