title: The central Onodi cell: A previously unreported anatomic variation.
abstract: Preoperative recognition of the Onodi cell is necessary to avoid injury to closely associated structures, including the internal carotid artery and the optic nerve. This article describes the central Onodi cell, a variation in which a posterior ethmoid cell lies superior to the sphenoid sinus in a midline position with at least one optic canal bulge. To our knowledge, this anatomic variation has not been previously reported in the literature. Radiographic and endoscopic imaging of this unique variation is provided.
authors.affiliation: Departments of Otolaryngology-Head and Neck Surgery and.
authors.forename: Deepa V
authors.initials: DV
authors.lastname: Cherla
authors.forename: Senja
authors.initials: S
authors.lastname: Tomovic
authors.forename: James K
authors.initials: JK
authors.lastname: Liu
authors.forename: Jean Anderson
authors.initials: JA
authors.lastname: Eloy
keywords: Anatomic variation; Onodi cell; computed tomography; endoscopic sinus surgery; endoscopic skull base surgery; ethmoid sinus; optic nerve; parasellar anatomy; sphenoid sinus; transsphenoidal surgery