Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
Libyan j. med
; 3(4): 128-133, 2008.
Article
in English
| AIM
| ID: biblio-1265083
Responsible library:
CG1.1
ABSTRACT
Background:
Sphenoid sinus is the most inaccessible paranasal sinus; enclosed within the sphenoid bone and intimately related to numerous vital neural and vascular structures. Anatomic variation of the sphenoid sinus is well documented and may complicate surgery in such a place.Objective:
To outline the surgically risky anatomic variants of the sphenoid sinus as well as the variable relationships between the sinus and related neurovascular structures; for the safe removal of intrasphenoid and pituitary lesions. Materials andMethods:
We undertook a prospective review of 300 paranasal sinus CT scans of Libyan patients; coronal CT scans were obtained by special parameter techniques. We assessed pneumatization of pterygoid process (PP); anterior clinoid process (ACP); and greater wing of sphenoid (GWS); we also examined protrusion and dehiscence of internal carotid artery (ICA); optic nerve (ON); maxillary nerve (MN); and vidian nerve (VN) into the sphenoid sinus cavity.Results:
Pneumatization of PP; ACP; and GWS were seen in 87 (29); 46 (15.3); and 60 patients (20); respectively. Protrusion of ICA; ON; MN; and VN were noticed in 123 (41); 107 (35.6); 73 (24.3); and 81 patients (27); respectively; dehiscence of these structures was encountered in 90 (30); 92 (30.6); 39 (13); and 111 patients (37); respectively. Statistically; there was a highly significant association between ACP pneumatization and ICA protrusion; ACP pneumatization and ON protrusion; PP pneumatization and VN protrusion; and GWS pneumatization and MN protrusion (p-value 0.001).Conclusion:
The sphenoid sinus is highly variable; this variability necessitates a comprehensive understanding of the regional sphenoid sinus anatomy by a detailed CT scan sinus examination before surgery in and around the sinus. This study indicates the possibility of a racial anatomical variation of the sphenoid sinus in the Libyan population
Full text:
Available
Index:
AIM (Africa)
Main subject:
Optic Nerve
/
Sphenoid Sinus
/
Carotid Arteries
/
Maxillary Nerve
Language:
English
Journal:
Libyan j. med
Year:
2008
Type:
Article
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