Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal chest radiograph demonstrates stable moderate loculated left pleural effusion . No pneumothorax identified . Pleurex catheter not identified . Mediastinal and hilar contours are unremarkable . Unable to assess heart size given adjacent effusion . Lungs are clear . No right - sided pleural effusion .
    OUTPUT:
    
Unchanged examination . Stable loculated left effusion . No pneumothorax . PleurX catheter not identified .