Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a stable small pneumothorax which is predominantly anterior and lateral , where it loculates somewhat to the base of the right chest . There is no shift of midline structures . There has been no definite change allowing for differences in technique in orientation . Background interstitial disease is again noted .
    OUTPUT:
    
Small right - sided pneumothorax , without definite change , allowing for differences in technique in orientation .