Hellow guys, Welcome to my website, and you are watching STEP 1: MASTOIDECTOMY AND RETROLABYRINTHINE EXPOSURE CORTEX BONE REMOVAL IN THE MASTOID TRIANGLE. and this vIdeo is uploaded by Neurosurgeon Prof. Sufianov A.A. at 2016-06-19T06:15:59-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.