Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left apical pneumothorax is small and unchanged in size since the prior study . Left chest tube is in unchanged position . Opacity at the left lung base is also unchanged likely secondary to atelectasis although it is difficult to discern if it contains some foci of air . The right lung is clear . Postoperative appearance of the cardiomediastinal silhouette is within normal limits . A right small subpulmonic effusion is present . Median sternotomy wires are noted . A right IJ central venous catheter terminates in the right atrium .
    OUTPUT:
    
1 . Small left apical pneumothorax , similar in size to prior study . 2 . Atelectasis at the left lung base . 3 . Small right subpulmonic pleural effusion .