Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post left pneumonectomy with air - fluid level noted in the pneumonectomy cavity . The amount of fluid in the pleural space has increased since the prior study , an expected finding . There is unchanged leftward shift of mediastinal structures due to volume loss . Subcutaneous emphysema in the left chest wall and extending into the left neck appears relatively unchanged . The right lung is clear . No right - sided pleural effusion or pneumothorax is present . There is no pulmonary vascular congestion . Left - sided rib deformities are compatible with prior thoracotomy .
    OUTPUT:
    
Post - surgical changes in the left hemithorax from prior pneumonectomy with continued subcutaneous emphysema in the left chest wall . Right lung is clear .