Locating the facial nerve is an essential step in most mastoid procedures. A constantly occurring, easily identifiable, arterial bleeding point has been identified arising on the posterosuperior-lateral eminence of the posterior genu of the nerve, passing posterosuperiorly. The vessel permits exact siting of the genu before the nerve is seen, and provides a timely warning of the nerve's presence.
1Consultant Otolaryngologist, Royal Children's Hospital, Brisbane, and Clinical Associate Professor, University of Queensland, Australia
2Reprint requests: Dr. Bruce Black, 73 Wickham Terrace, Brisbane. 4000. Australia