loading page

A STUDY OF ANATOMICAL VARIATIONS IN SPHENOID SINUSES AND THEIR ASSOCIATION WITH EXTENT OF DISEASE USING MODIFIED LUND MACKAY STAGING SYSTEM
  • Karthika Rajeev,
  • RAVISHANKARA S,
  • C.S CHETHANA
Karthika Rajeev
no affiliation

Corresponding Author:[email protected]

Author Profile
RAVISHANKARA S
no affiliation
Author Profile
C.S CHETHANA
no affiliation
Author Profile

Abstract

OBJECTIVES: The objective of this study is to detect the incidence of anatomical variations of sphenoid sinus and its association with the extent of disease using Modified Lund Mackay staging system. METHOD: Cross sectional study . SETTING: A tertiary care centre. PARTICIPANTS: 201 patients with history of chronic rhinosinusitis attended the outpatient department of otorhinolaryngology were subjected for CT-paranasal sinus from November 2016 to May 2018. MAIN OUTCOME MEASURES: CT paranasal sinus was performed 16 slice CT machine .The radiological findings of sphenoid were characterized by Modified Lund-Mackay staging system and the points were awarded on both sides separately. RESULTS: The mean age of study were 37.6(SD=11.4). Regarding the incidence of anatomical variations in sphenoid sinus observations were hypoplasia(right-0.5%,left-2.5%),agenesis(right-0.5%),pneumatization of pterygoid process(right-49.3%,left-40.3%),pneumatization of anterior clinoid process(right-27.4%,left-15.9%),pneumatization of greater wing of sphenoid(right-5%,left-4.5%),protrusion (right-3.5%,left-1%) and dehiscence (right-1.5%,left-2.5%) of internal carotid artery, protrusion (right-3.5%,left-3%) and dehiscence (right-4%,left-4%) of optic nerve,protrusion (right-4%,left-4%) and dehiscence (right-1%,left-1%) of maxillary nerve, protrusion (right-37.3%,left-33.3%) and dehiscence (right-1.5%,left-1.5%) of vidian canal,onodi cell(right-7%,left-7%),conchal(right-0.5%,left-0.5%),sellar(right-85.1%,left-82.1%),presellar (right-6%,left-4%), postsellar(right-7.5%,left-5.5%) and intersphenoid septum – absent(1.5%),single(77.6%),accessory (right-16.9%%,left-4.5%). There was statistically significant association between pneumatization of pterygoid, anterior clinoid, greater wing of sphenoid, protrusion of vidian canal and sphenoid sinusitis. CONCLUSION: It is necessary to know the variations of sphenoid sinus and care should be observed to avoid complications during surgery on patients carrying these variations. KEYWORDS: anatomical variations; chronic rhinosinusitis ; sphenoid sinus ; CT paranasal sinus ; modified Lund Mackay staging  .