Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , a small left apical pneumothorax is unchanged with left chest tube in place . Mild pulmonary edema and hilar enlargement are improved . Lung volumes remain low . Mild cardiac enlargement persists . Small bilateral pleural effusions are presumed .
    OUTPUT:
    
1 . Stable left apical pneumothorax with improved mild pulmonary edema since ___ .