Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small left apical pneumothorax . Lucency at the left lung base also is suspected to represent a portion of the pneumothorax . There is a small left effusion . A left sided pigtail type catheter is in place , overall similar , but slightly different in configuration . A portion of the tip is obscured by the patient 's indwelling catheter . There is increased retrocardiac opacity likely representing combination of left lower lobe collapse and / or consolidation pleural fluid , similar to the prior study . The cardiomediastinal silhouette is grossly unchanged . No CHF . Small right pleural effusion is unchanged . No right - sided pneumothorax is detected . Again seen is a left - sided indwelling catheter , with tip over distal SVC .
    OUTPUT:
    
1 . Retrocardiac opacity , consistent with left lower lobe collapse and / or consolidation unchanged . 2 . Left pigtail type catheter slightly different in configuration , but overall similar , partially obscured by the indwelling catheter . Note is made that the pig tail portion is not clearly well formed on the available images , though this could be artifact due to positioning . 3 . Left apical lucency represents a small left pneumothorax , increased compared with the most recent prior film . Lucency at the left base is also thought represent a pneumothorax . This is slightly more pronounced / visible on the current exam , though it is possible that this is due to the interval improvement in a small left pleural effusion . Attention to this area on followup films is requested .