Prevalence of fungal infection in nasal polyposis - A cross-sectional study, conducted at a tertiary care hospital in Karachi.

Objective: To determine the prevalence of fungal infections causing nasal polyposis (AFRS-Allergic fungal rhino sinusitis) in the local population.
Methods: It is a cross sectional study, carried out from October 2010 to January 2015 on 221 patients in the ENT Department of Abbasi Shaheed Hospital and Karachi Medical & Dental College in collaboration with the microbiology department. This study included patients who had a clinical diagnosis of nasal polyposis with or without fungal infection on the basis of nasoendoscopic examinations. All patients underwent Functional Endoscopic Sinus Surgery (FESS) and the diagnosis of (AFRS-Allergic fungal rhino sinusitis) was considered after histopathological confirmation of eosinophilic mucous containing hyphae. Numerator included the total number of patients who presented to the ENT out-patient clinic of Abbasi Shaheed Hospital suffering from nasal polyposis secondary to fungal infection during the follow-up period of the study. On the other hand, denominator included all the patients who attended the ENT out-patient clinics during the same follow-up period. This determined the period prevalence of fungal infections in nasal polyposis at a tertiary care centre in Karachi.
Results: Data was collected, a descriptive analysis was performed and a Computed Tomography (CT) grading was done. On the basis of histopathology, 90 (40.7%) patients were found to have fungal infection.
Conclusions: The prevalence of fungal infections was 40.7% (90 patients) in nasal polyposis.