title: Anterior skull base trauma during endoscopic sinus surgery for nasal polyposis preferred sites for iatrogenic injuries.
abstract: OBJECTIVE
  To determine typical locations for traumatic lesions of the anterior skull base during endoscopic sinus surgery.
  
  
  METHODS
  In this retrospective study 12 patients were included who had undergone endoscopic sinus surgery for nasal polyposis and were referred to the author for revision surgery after iatrogenic trauma of the anterior skull base during the procedure. Each patient had been operated by a different surgeon, all of the physicians being in an advanced stage of their surgical career and being board certified otolaryngologists.
  
  
  RESULTS
  During endoscopically controlled revision surgery, all lesions could be detected, 10 of them being located in the ethmoid roof, while one injury had occurred in the lateral lamella of the cribriform plate and another one in the olfactory groove between the medial turbinate and the nasal septum.
  
  
  CONCLUSIONS
  In contrast to reports in the literature, the preferred site for anterior skull base injuries during endoscopic sinus surgery in our group was not the lateral lamella of the cribriform plate, but the anterior part of the ethmoid roof, just behind the frontal recess. Apparently the course of the ethmoid roof might be misinterpreted during sinus surgery even by surgeons who are familiar with the operative technique.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, University of Munich, Munich, Germany. grevers@gmx.de
authors.forename: G
authors.initials: G
authors.lastname: Grevers
mesh_terms: D004724:Endoscopy / Q000009:adverse effects*; D006801:Humans; D007049:Iatrogenic Disease; D009298:Nasal Polyps / Q000601:surgery*; D012189:Retrospective Studies; D019291:Skull Base / Q000000981:diagnostic imaging / Q000293:injuries*; D014057:Tomography, X-Ray Computed