Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph ___ at 08 : 53 is submitted .
    OUTPUT:
    
Left subclavian PICC line is unchanged in position . Stable biapical pleural thickening consistent with known radiation therapy . Patchy opacity at the left base adjacent to the left heart border may reflect an area of atelectasis or confluence of vascular structures , although aspiration or pneumonia should be considered in the correct clinical setting . No large effusions . No pneumothorax . No pulmonary edema . Overall cardiac and mediastinal contours are unchanged .