Diagnosis of Bone Erosion in Patients of Allergic Fungal Rhinosinusitis on Computerized Tomography Scan

Objective:To determine the frequency of bone erosion on computerized tomography (CT) scans in patients with allergic fungal Rhinosinusitis in Pakistan. Methodology: A Prospective observational study was conducted at ENT department of Pak Fazaia Medical College PAF Hospital, Islamabad City, from Feb 2023 to Jan 2024.A total of 125 patients diagnosed with Allergic Fungal Rhinosinusitis according to Bent and Swain criteria were enrolled. Patients were then categorized based on the extent and site of bone erosion. SPSS version 27 selected for data analysis, after initial calculation of mean and standard deviations or frequency percentages test of significance (chi square test for categorical variables and t-test for numerical variables) was applied. P values ?0.05 was taken as significant. Results:Out of 47 bone erosion patients, 51.1% patients had mild, 19.1% had moderate and 29.8% patients had severe level of disease. The distribution of site and subsite in bone erosion patients were shown in table. II. Ethmoid was seen in 27.7% patients, frontal was seen in 17.0% patients, sphenoid was seen in 25.5% patients, andmaxillay was seen in 29.8% patients. Conclusion: Allergic Fungal Rhinosinusitis often leads to significant bone erosion, which can be effectively detected through a CT scan. The maxillary sinus is the most commonly affected site among the paranasal sinuses.