Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Left upper lobe volume loss is similar to prior study . There is no new consolidation , effusion , or pneumothorax . Leftward mediastinal shift is unchanged . Posterior fracture of the left sixth rib is unchanged . Fracture of the two uppermost mediastinal wires is stable .
    OUTPUT:
    
Stable left lung volume loss after left upper lobe lobectomy .