Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are stable in appearance in the postoperative period in this patient status post recent median sternotomy and mitral valve replacement . Central venous catheter continues to terminate in the lower superior vena cava . Tiny left apical pneumothorax is in retrospect slightly smaller than on the previous radiograph . Slight worsening of left retrocardiac atelectasis and adjacent small pleural effusion . Small right pleural effusion is apparently new .
    OUTPUT:
    
1 . Decreased size of left pneumothorax with residual tiny pneumothorax remaining . 2 . Worsening left pleural effusion and left retrocardiac atelectasis . 3 . Small right pleural effusion with adjacent basilar atelectasis .