title: [The anterosigmoidal approach. A function-preserving surgical method for petroclival tumors].
abstract: OBJECTIVE
  The antero- or persigmoid approach preserves all functional structures of the petrous bone and, therefore, is an alternative to the classic laterobasal approaches for exploring the petroclival region. As high morbidity is assumed and it is a time consuming procedure, this approach is not well known.
  
  
  METHODS
  Initially, a cadaver study using computer assisted surgery was used to determine the surgical workflow before we optimized our surgical procedures.
  
  
  RESULTS
  In a series of 7 patients with benign tumors growing from the petrous apex to the petroclival region, we were able to resect all tumors completely via the anterosigmoidal surgical corridor using computer assisted surgery.
  
  
  CONCLUSIONS
  The navigation-guided anterosigmoidal approach is an excellent method, allowing a good overview of the petroclival region. In patients suffering from complex petroclival tumors, it offers a real chance to achieve complete microsurgical tumor resection without functional defects by an interdisciplinary neuro-oto-surgical session.
authors.affiliation: Universitätsklinik für Hals-, Nasen- und Ohrenheilkunde und Poliklinik, Universitätsklinikum Freiburg. schipper@hno.ukl.uni-freiburg.de
authors.forename: J
authors.initials: J
authors.lastname: Schipper
authors.forename: G J
authors.initials: GJ
authors.lastname: Ridder
authors.forename: W
authors.initials: W
authors.lastname: Maier
authors.forename: U
authors.initials: U
authors.lastname: Spetzger
mesh_terms: D000293:Adolescent; D000328:Adult; D002102:Cadaver; D003388:Cranial Fossa, Posterior / Q000601:surgery*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures / Q000379:methods*; D010579:Petrous Bone / Q000601:surgery*; D020127:Recovery of Function; D016879:Salvage Therapy / Q000379:methods; D012888:Skull Neoplasms / Q000175:diagnosis* / Q000601:surgery*; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome