Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Background changes of COPD including bullous disease , scarring in distortion of the pulmonary architecture are similar when compared to the prior study . Airspace opacity at the right lung base has improved slightly when compared to the prior study . No pneumothorax . No pleural effusion seen .
    OUTPUT:
    
Slight interval improvement in the right basal consolidation . Persistent visualization of a a stellate mass in the right upper lung , this may reflect scarring in distortion related the underlying COPD but a neoplasm can not be excluded and a CT chest is recommended to further evaluate .