Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Post-operative changes of left upper lobectomy are again seen with left - sided volume loss with mediastinal shift and changes of the thoracic cavity . Configuration of air and fluid in the cavity has not definitely changed given differences in positioning and technique . Persistent posterior basilar consolidation at the left lung has not significantly changed . Right apical pleural - based scarring is unchanged . Remainder of the right lung is grossly clear and the cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
Post-operative changes on the left . Persistent consolidation in the left lower lobe which has not significantly changed since prior .