Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate a stable 11 mm nodule within the left upper lobe . The lungs are well expanded and otherwise clear . The pleural surfaces are normal . The cardiac silhouette and mediastinal contours are normal . No thoracic cage abnormality is detected .
    OUTPUT:
    
1 . No acute chest abnormality . 2 . Stable left upper lobe pulmonary nodule , which is benign . These findings were discussed with Dr . ___ by phone at 2 :40 p .m .