Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously seen bilateral ground - glass opacities appear similar to prior and are consistent with patient 's underlying chronic lung disease likely secondary to crack cocaine inhalation . There is no new confluent consolidation . No pneumothorax is evident . Pleural surfaces are clear without effusion . Mediastinal and hilar contours are within normal limits . Moderate cardiomegaly appears unchanged .
    OUTPUT:
    
Stable baseline chronic lung disease without superimposed acute process .