Cargando…

Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study

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 outlin...

Descripción completa

Detalles Bibliográficos
Autores principales: Hewaidi, GH, Omami, GM
Formato: Texto
Lenguaje:English
Publicado: CoAction Publishing 2008
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074265/
https://www.ncbi.nlm.nih.gov/pubmed/21499453
http://dx.doi.org/10.4176/080307
_version_ 1782201703199670272
author Hewaidi, GH
Omami, GM
author_facet Hewaidi, GH
Omami, GM
author_sort Hewaidi, GH
collection PubMed
description 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 AND METHODS: 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.
format Text
id pubmed-3074265
institution National Center for Biotechnology Information
language English
publishDate 2008
publisher CoAction Publishing
record_format MEDLINE/PubMed
spelling pubmed-30742652011-04-15 Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study Hewaidi, GH Omami, GM Libyan J Med Original Article 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 AND METHODS: 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. CoAction Publishing 2008-09-01 /pmc/articles/PMC3074265/ /pubmed/21499453 http://dx.doi.org/10.4176/080307 Text en http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Hewaidi, GH
Omami, GM
Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title_full Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title_fullStr Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title_full_unstemmed Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title_short Anatomic Variation of Sphenoid Sinus and Related Structures in Libyan Population: CT Scan Study
title_sort anatomic variation of sphenoid sinus and related structures in libyan population: ct scan study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3074265/
https://www.ncbi.nlm.nih.gov/pubmed/21499453
http://dx.doi.org/10.4176/080307
work_keys_str_mv AT hewaidigh anatomicvariationofsphenoidsinusandrelatedstructuresinlibyanpopulationctscanstudy
AT omamigm anatomicvariationofsphenoidsinusandrelatedstructuresinlibyanpopulationctscanstudy