Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest film ___ at 10 :31 is submitted .
    OUTPUT:
    
Left lateral chest wall subcutaneous emphysema again noted . The previously reported small left apical pneumothorax is not definitively seen on this examination . Patchy bibasilar opacities , left greater than right , which likely reflect atelectasis , although superimposed pneumonia can not be excluded . There continues to be left lateral pleural thickening which could reflect a component of loculated fluid . No evidence of pulmonary edema . Overall cardiac and mediastinal contours are likely unchanged but somewhat difficult to assess due to the opacification at the left base .