Giant ossifying fibroma

Ossifying fibroma is a slow-growing, benign neoplasm, but some lesions behave aggressively, reaching massive proportions, thus demanding special treat- ment. The following case report holds particular interest, because of the simul- taneous occurrence of an active ossifying-cementifying fibroma in the maxilla and mandible with the maxillary lesion attaining enormous size. The fibro-osseous lesions of the jaws comprise a diverse, but challenging group of conditions. Common to all fi- bro-osseous lesions is the replacement of normal bone by a tissue composed of collagen fibers and fibroblasts that contains varying amounts of mineral- ized substance, which may be bony or cementum-like or an admixture of both. Although MENZEL in 1842, 23 first de- scribed the entity known as ossifying fibroma, it was MONTOGOMERY 23 who in 1927 coined the term "ossifying fi- broma". Subsequent to the introduction of the term "fibrous dysplasia" by LICH- TENSTEIN 12 in 1938 it was suggested that lesions of the jaws previously designated as fibrous osteoma or ossifying fibroma should be called fibrous dysplasias.

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