RESUMEN
Introduction: Chronic rhinosinusitis (CRS) is one of the mostcommon health care problems, with significant direct medicalcosts and severe impact on lower airway disease and generalhealth outcomes. The aim of this study was to study theinvolvement of Sinuses on CT among Chronic Rhinosinusitispatients.Material and methods: The study was a cross sectionalobservational study. All the patients having clinical findings ofCRS referred from ENT Department for CT PNS constitutedthe study population. All the patients were submitted todetailed clinical examination, routine investigation andsubsequently submitted for CT scan of PNS.Results: Maxillary sinus was found to be most common sinus(68.5%) followed by Ethmoidal Sinus (60.9%), SphenoidalSinus (38%), Sphenoidal Sinus (26.1%), Isolated Maxillary(23.9%) and Pansinusitis (14.1%). The percentage of othersinuses was less than 10%. Single number of sinus wasobserved in 48.9% patients followed by multiple (40.2%) andnone (10.9%).Conclusion: There are a multitude of anatomic variants of thesinonasal cavities. Some of which are such common that theyare most likely found in the majority of individuals.