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Corresponding Author: Md. Jawed Akhtar,Assistant Professor,Department of Anatomy, Indira Gandhi Institute of Medical Sciences, Patna (Bihar), India. E-Mail: drjawed2k@gmail.com Introduction: The middle turbinate may be pneumatized and ballooned up. This is called a concha bullosa. The concha bullosa may show isolated involvement with the disease process. It may compromise ventilation and drainage of secretions to produce chronic infections of the paranasal sinuses. This study aimed at determining the prevalence of concha bullosa in the adult Eastern Indian Population. Materials and Methods: This was a retrospective study being conducted on 150 patients who presented to the Department of Radiodiagnosis, Bangur Institute of Neurosciences, Kolkata. Their CT scans were analysed for the presence of Concha Bullosa. The results were analysed as percentage and ‘p’ value was calculated using Fischer’s Exact Test. Results: Presence of Concha Bullosa was observed in 48 cases i.e. 32% in the present study, out of which 21 (14%) were present in males and 27 (18%) in females. ‘p’ value in this case was 0.162 on applying Fisher’s Exact test. Conclusion: Anatomical variations of the paranasal sinus region like concha bullosa are quite common and they must be searched for by the surgeons before planning any endoscopic sinus surgery. This study attempted to provide the prevalence of the Concha Bullosa which will definitely help the FESS surgery and its outcomes.

CT SCAN EVALUATION OF PREVALENCE OF CONCHA BULLOSA IN ADULT EASTERN INDIAN POPULATION