Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ the left thoracostomy tube has been removed and a small amount of fluid has accumulated in the previous small pneumothorax in the posterior left costal pleural space . Moderate left basal atelectasis is unchanged . The lower esophageal stent has not migrated and its caliber is intact . Small amount of contrast an agent in the mediastinum reflects prior demonstrated leakage . The right lung is clear . Right PIC line ends close to the superior cavoatrial junction .
    OUTPUT:
    
Small pleural fluid accumulation in preexisting small left costal pneumothorax following removal of thoracostomy tube . Stable moderate left lower lobe atelectasis .