Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . Increased interstitial markings with likely bronchiectasis are most pronounced within the left lung base , progressed when compared to the prior chest radiograph , but seen on the prior CT . No focal consolidation , pleural effusion or pneumothorax is otherwise demonstrated . No acute osseous abnormalities detected . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Increased interstitial abnormality at the left lung base likely reflects chronic fibrotic change with bronchiectasis , better seen on the prior CT , but progressed when compared to the prior chest radiograph . No focal consolidation suggestive of pneumonia is identified .