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EVALUATION OF VARIATIONS IN SPHENOID SINUS
PNEUMATIZATION USING MULTIDETECTOR COMPUTED
TOMOGRAPHY IN PATIENTS ATTENDING TERTIARY CARE HOSPITAL,
VISAKHAPATNAM

BACKGROUND: The purpose of our study was to assess the prevalence of different patterns of pneumatization in the
sphenoid sinuses as detected on the computed tomography (CT) images of paranasal sinuses of the patients presenting
with various pathologies. This is a retrospective radiological study of CT im MATERIALS AND METHODS: ages of paranasal sinuses, done
at Radio diagnosis department of a Tertiary care hospital. The study comprised CT images of 500 patients in the age range of 18-75years who
were referred for CT scan of paranasal sinuses for various pathologies between the period of July 2018 and July 2019. All images of paranasal
sinuses had been acquired following a standardized protocol in axial plane. Their reconstructed images in axial, coronal and sagittal planes were
evaluated, using Osirix software, for the extent and different patterns of sphenoid sinus pneumatization. The Images of sphenoid sinuses were
assessed for the posterior, lateral and anterior extension of their pneumatization The sphenoid sinuses pneumatization patterns in the RESULTS:
descending order of prevalence were complete sellar (75.0%), incomplete sellar (22.6%), presellar (2.4%) and conchal (0%). The clival
extensions was seen in 75% of patients and lateral extension sides in 49.1% patients. Lateral recesses as assessed on coronal images was seen in
49.1 % of cases with the prevalence in descending order being extension into pterygoid process 59.8 %, greater wing of sphenoid 9.2 %, full
lateral 41% and lesser wing (anterior clinoid process) 19.3%. The pure forms were relatively less common and combined forms being more
common. A preoperative review of the sphenoid anatomy should allow for safer endo