Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates interval placement of a left - sided PleurX catheter . There has been interval decrease in left - sided pleural effusion . In the apex and lateral left chest wall , there are areas of increased lucency , which may represent a pneumothorax versus expanded lung . Stable - appearing interstitial abnormality in the right lung may represent pulmonary edema versus dissemination of tumor . Again seen is a discrete metastatic mass in the right upper lobe .
    OUTPUT:
    
Status post-placement of left PleurX catheter with interval decrease in left - sided pleural effusion . Left - sided apical and lateral areas of hypodensity may represent pneumothorax versus expanding lung . Recommend repeat radiograph of the chest for additional evaluation of possible pneumothorax .