Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are provided . Again noted are prominent interstitial markings in the lung bases . There is no focal consolidation , pleural effusions or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Persistent prominent interstitial markings , which may reflect patient 's known history of underlying asthma . No focal consolidation .