Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable small left apical pneumothorax . Left pigtail catheter is unchanged in position and is in the lateral left chest . Left mid lung linear scarring is unchanged . Lungs are clear bilaterally and no large pleural effusion . Heart size , mediastinal contour and hila are normal . No bony abnormality .
    OUTPUT:
    
Stable small left apical pneumothorax . Results were conveyed via telephone to Dr . ___ by Dr . ___ on ___ at 2 : 15 p . m . 15 minutes after observation of findings .