Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest images demonstrate small remaining pneumothorax in the left lung apex . There is some increased atelectasis at the lung bases bilaterally . Additional orthopedic lumbar fixation hardware has been added in the interval since previous chest radiograph . Cardiomediastinal silhouette is unremarkable . There is no pleural effusion .
    OUTPUT:
    
Small amount of remaining pneumothorax in the left lung apex . Interval addition of lumbar fixation hardware .