title: Extension of the frontal sinus into the roof of the optic canal: a cadaveric case report.
abstract: This case reports a bilateral asymmetrical posterior extension of the frontal sinuses into the orbital roof with an unusual expansion into the roof of the optic canal in a 55-year-old male cadaver. The posterior extensions of the sinus were lined by mucoperiosteum and were separated from the underlying orbital contents and optic nerve by a thin plate of bone. This knowledge of an unusual anatomic variation of the frontal sinus may help understand better the ocular and intracranial complications associated with frontal sinus pathologies.
authors.affiliation: Division of Health Sciences, University of South Australia, City East Campus, Adelaide, SA, 5000, Australia. harsha.wechalekar@unisa.edu.au.
authors.forename: H
authors.initials: H
authors.lastname: Wechalekar
mesh_terms: D063405:Anatomic Variation; D002102:Cadaver; D004210:Dissection; D005626:Frontal Sinus / Q000002:abnormalities*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000002:abnormalities*; D009915:Orbit / Q000002:abnormalities* / Q000294:innervation
keywords: Anatomical variation; Frontal sinus; Optic canal; Orbital roof