Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the region of the left breast surgical bed , there is a large fluid collection , with air - fluid level likely measuring greater than 6 .3 cm in diameter . An overlying iatrogenic disc and drain are present . A small amount of subcutaneous emphysema is seen in the overlying superficial soft tissues this obscures portions of the lower left chest . Clips noted in the left axilla . There is a right - sided indwelling catheter , with tip overlying the distal SVC / RA junction . No pneumothorax is detected . The cardiomediastinal silhouette is grossly unremarkable , partially obscured by the changes in left breast surgical head and the the patient 's arm by their side . There is minimal upper zone redistribution , without other evidence of CHF . Doubt focal infiltrate . No gross effusion . Minor blunting of the costophrenic angles can not be entirely excluded .
    OUTPUT:
    
1 . Changes overlying the lower left chest at the site of the prior mastectomy , with prominent air - fluid level . Clinical correlation is required for further assessment . 2 . Doubt pneumonic infiltrate . 3 . Trace upper zone redistribution , without overt CHF . Possible minimal pleural fluid .