One millimetre can make all the difference in neurosurgeryTo play this video you need to enable JavaScript in your browser.This video can not be playedOne millimetre can make all the difference in neurosurgeryCloseWatch the full episode on BBC iPlayer.SectionNewsPublished3 MayShareclose panelShare pageCopy linkAbout sharingRelated topicsSurgeryFollow Surgeryclose panelYou are now following SurgeryUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description