title: Full endoscopic endonasal transsellar-transclival approach: the modularity concept.
abstract: BACKGROUND
  Endoscopic endonasal approaches (EEAs) constitute a reasonable option for the treatment of lesions that involve the sellar and clival regions.
  
  
  METHODS
  We describe, step by step, the full EEA expanded to the middle and lower clivus for the treatment of perisellar lesions. Delimiting different modules around the sellar region is useful in establishing the best endoscopic approach for each tumor. A craniopharyngioma (CP) with clival extension will be used as an illustrative example of the modularity concept of these approaches.
  
  
  CONCLUSIONS
  Transsellar-transclival EEA allows complete resection of lesions located in the sellar and infrasellar region with a low rate of complications.
authors.affiliation: Department of Neurosurgery, Hospital Universitario y Politécnico La Fe, Bulevar Sur s/n. Carretera de Malilla, 46026, Valencia, Spain. peterpborreda@gmail.com.
authors.forename: Pedro
authors.initials: P
authors.lastname: Pérez-Borredá
authors.affiliation: Department of Neurosurgery, Hospital Universitario y Politécnico La Fe, Bulevar Sur s/n. Carretera de Malilla, 46026, Valencia, Spain.
authors.forename: Juan Antonio
authors.initials: JA
authors.lastname: Simal-Julián
authors.affiliation: Department of Neurosurgery, Hospital Universitario y Politécnico La Fe, Bulevar Sur s/n. Carretera de Malilla, 46026, Valencia, Spain.
authors.forename: Laila Pérez
authors.initials: LP
authors.lastname: de San Román-Mena
authors.affiliation: Department of Neurosurgery, Hospital Universitario y Politécnico La Fe, Bulevar Sur s/n. Carretera de Malilla, 46026, Valencia, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Botella-Asunción
mesh_terms: D003388:Cranial Fossa, Posterior / Q000601:surgery*; D003397:Craniopharyngioma / Q000601:surgery*; D004724:Endoscopy / Q000009:adverse effects / Q000379:methods*; D006801:Humans; D019635:Neurosurgical Procedures / Q000009:adverse effects / Q000379:methods*; D009666:Nose / Q000601:surgery*; D019292:Skull Base Neoplasms / Q000601:surgery*; D025321:Surgery, Computer-Assisted / Q000009:adverse effects / Q000379:methods*
keywords: Endoscopic endonasal surgery; Modularity; Transclival