Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs again demonstrate left apical pneumothorax . It now measures 13 mm in width compared to 10 mm at 9 :01 a .m . The lungs are clear . Cardiomediastinal silhouette is normal . There is no pleural effusion . There is no mediastinal shift .
    OUTPUT:
    
Slight increase in size of left apical pneumothorax , now measuring 13 mm . Findings were discussed by Dr . ___ with Dr . ___ by phone at 2 :55 p .m . on ___ at the time of interpretation .