title: Anatomic variations of posterior paranasal sinuses and optic nerve.
abstract: Aim To define direct anatomical relations of the sphenoidal (alae minores), ethmoidal sinuses and optic nerve, with an emphasis on determining the effect of age on pneumatisation and dehiscence. Methods This retrospective, descriptive study involved 60 consecutive patients: 30 patients younger than 30 and30 patients older than 60 years of age. All patients underwent computerized tomography(CT). The relationship of the optic nerve and the sphenoidal and ethmoidal sinuses was classified. The presence of dehiscence in the bone structures, forming the optic canal, was checked. Dehiscence was defined as absence of visible bone density located between the sinus and the optic nerve. Protrusion of the optic nerve into the sphenoidal sinus was defined as optic nerve surrounded by pneumatised space. Results The most common type of relation between the optic nerve and sphenoidal sinus was type I, where the optic nerve was immediately adjacent to the lateral or superior wall of the sphenoidal sinus, without impression on the sinus wall. Dehiscence was documented in 15 (25%) cases, it was more common in older patients (8, 27%) than in younger ones (7, 23%). The pneumatisation processes were more frequent in patients over 60 (5, 17%) than in those younger than 30 years (4, 13%). Conclusion Surgeons and ophthalmologists should be aware of high frequency of dehiscence of sphenoidal sinus walls when treating adult patients in our population, especially when evaluating risks and complications of surgical procedures or when diagnosing inflammatory or tumorous processes in the close vicinity of posterior paranasal sinuses.
authors.affiliation: Department of Radiology, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Alma
authors.initials: A
authors.lastname: Efendić
authors.affiliation: Department of Ophthalmology, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Edin
authors.initials: E
authors.lastname: Muharemović
authors.affiliation: Department of Neurosurgery, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Rasim
authors.initials: R
authors.lastname: Skomorac
authors.affiliation: Department of Neurosurgery, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Hakija
authors.initials: H
authors.lastname: Bečulić
authors.affiliation: Depatment of Microbiology, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Sabina
authors.initials: S
authors.lastname: Šestić
authors.affiliation: Thermal Power Plant Tuzla, Tuzla; Bosnia and Herzegovina.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Halilović
authors.affiliation: Department of Clinical Pharmacology, Cantonal Hospital Zenica, Zenica; Bosnia and Herzegovina.
authors.forename: Mersiha
authors.initials: M
authors.lastname: Mahmić-Kaknjo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D063405:Anatomic Variation; D005005:Ethmoid Sinus / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009900:Optic Nerve / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D013101:Sphenoid Sinus / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult
keywords: ethmoid sinus; intraoperative complications; sphenoid sinus