Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube is in unchanged position . Right PIC catheter tip projects over mid SVC . Moderate left pneumothorax is noted . There is no right pneumothorax . Left costophrenic angle is blunted , suggestive of small - to - moderate pleural effusion or changes related to pleurodesis . Left lung base opacity likely represents atelectasis . Hilar and mediastinal silhouettes are unchanged . Heart size is top normal . PEG tube is in place . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Moderate left pneumothorax .