Ossifying fibroma of the ethmoid sinuses: Rare scenarios

Abstract

Ossifying fibroma (OF) is a rare benign tumor, which is a distinct entity, despite being closely related to fibrous dysplasia, according to WHO classification of 2005. 1 It is commonly found in mandible and maxilla but rarely found in ethmoid sinuses, orbit and skull base. 2-4 It commonly occurs in age group of 20 to 40 years, 5,6 although rarely, it can present in all age groups. OF is more common in females than males. 4,7 We describe here two cases of OF involving the ethmoid sinuses in young male patients which presented diagnostic dilemmas for us. We report these cases as the site of involvement, age group and sex of patients and diagnostic and management considerations imparted uniqueness to these cases.