Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left basilar chest tube is unchanged in position . Since prior , there is interval increase in size of a small left apical pneumothorax . The cardiomediastinal silhouette is unchanged . There is increased opacification at the left lung base which likely represents a pleural effusion .
    OUTPUT:
    
1 . Interval increase in size of a small left apical pneumothorax . 2 . Increased left basilar opacification , likely representing a layering pleural effusion .