“…Apart from these factors etiological causes are exposure to allergens, trauma and microbial infections. These could manifest in the maxillary sinus as linear mucosal thickening which may progress to partial and total opacifi cation 14,15,16) . In the present study, the most common fi nding was mucosal thickening, this observation was in consistent with the fi ndings of Elwakeel et al ,8) Rege et al, 9) Jangam et al 10) , Raghav et al, 11) and Ritter et al…”