Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ at 19 :33 p .m . , the right apical pneumothorax is now not definitely identified . The possibility of a small residual pneumothorax can not be excluded . The right - sided chest tube is again noted , slightly different in configuration , but still with tip overlying the right upper lung . The cardiomediastinal silhouette is prominent , but unchanged , in the setting of continuing low lung volumes . Again seen are increased interstitial markings throughout both lungs , with some more confluent opacity in the right mid zone and left lung base , also similar to prior .
    OUTPUT:
    
As above . .