Endoscopic endonasal extradural posterior clinoidectomy: A key maneuver to access the retrosellar and upper retroclival area

Background: Endoscopic endonasal posterior clinoidectomy represents an important maneuver to improve access and visualization of the retrosellar and upper clivus area [1]. Three different techniques have been described in order to access and remove the posterior clinoid: 1) the intradural pituitary transposition [2], the interdural pituitary transposition [3] and a completely extradural technique [4]. Case description: We present here a case of retrosellar and retroclival chordoma that has been removed through endoscopic endonasal approach. Technical nuances of the endonasal extradural posterior clinoidectomy are presented. Conclusion: Endoscopic endonasal extradural posterior clinoidectomy allows to access this complex anatomical region with the advantage of avoiding major bleeding from the cavernous sinus and endocrinological impairment.