Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right lung and upper third of the left lung are clear . Heart size is indeterminate . Interval worsening of left lower lobe atelectasis with associated left mediastinal shift . left pleural effusion , however the interval change and amount is difficult to assess due to concurrent atelectasis . No focal consolidation suggesting pneumonia . No pneumothorax . The osseous structures are stable .
    OUTPUT:
    
Worsened left lower lobe atelectasis with left pleural effusion . .