Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , increased atelectasis at the left base is responsible for more leftward shift of the mediastinum . There is no pneumothorax pleural effusion if present is small . Moderate cardiomegaly is chronic . Subcutaneous emphysema the persists in the left lateral chest wall and supraclavicular region following removal of left pleural drains has improved in the neck , not appreciably changed in the incompletely imaged chest wall .
    OUTPUT:
    
1 . Increase in left lung base atelectasis . 2 . No pneumothorax or pleural effusion .