MULTISLICE COMPUTED TOMOGRAPHY IN EVALUATION OF SINONASAL ANATOMIC VARIANTS IN CHRONIC RHINOSINUSITIS USING C.L.O.S.E CHECKLIST
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Abstract
Purpose: To determine the incidence of sinonasal anatomic variants using “C.L.O.S.E” checklist in patients with chronic rhinosinusitis.Material and methods: A descriptive, prospective and retrospective study of 200 patients with chronic rhinosinusitis had performed MSCT and evaluated by “C.L.O.S.E” checklist at the Radiology Center of Hanoi Medical University Hospital. Result: In our study, the most frequent sinonasal anatomic variants were Onodi cells (98,5%), Agger Nasi cells (85%), septal nasal deviation (63,5%), Haller cells (46%), concha bullosa (34%). The osteomeatal complex obstruction was seen in 76,5% patients. By using C.L.O.S.E checklist, cribriform plate type II by Keros accounted for >70% in both sides. Lamina papyracea dehiscence was seen in <5%. 108/197 cases with onodi cells were exposed to optic nerve but were 5,58% compared with internal carotid artery. Anterior ethmoid artery was in safe place in most cases (> 70% in both sides). Sphenoid sinus type C by Congdon accounted for 61%. Conclusion: By studying 200 patients with chronic rhinosinusitis, the result showed the most frequent sinonasal anatomic variants were Onodi cells, followed by Agger Nasi cells and septal nasal deviation. Evaluation of sinonasal imaging findings using “C.L.O.S.E” checklist have an important role to minimize complications in Functional Endoscopic Sinus Surgery.
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Keywords
sinonasal anatomic variants, chronic rhinosinusitis.
References
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