Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable small left apical pneumothorax . Lungs clear bilaterally without large pleural effusion . Costophrenic angle is not seen on lateral radiograph . Heart size , mediastinal contours and hila are normal . No bony abnormality .
    OUTPUT:
    
Stable small left apical pneumothorax . Results were conveyed to primary team by Dr .___ on ___ at 3 : 50 PM , 20 minutes after observation of findings .