The purpose of this paper is to present a case of a fibro-osseous lesi
on which was diagnosed as an ossifying fibroma rather than a cemento-o
ssifying fibroma because of its location away from the the tooth beari
ng parts of the jaw and the absence of cemental tissue in the excised
specimen. Its location and features on a panoramic radiographic made S
tafne's idiopathic bone cavity a possible diagnosis.