Abstract
Giant cell reparative granuloma (GCRG) is an unusual, nonneoplastic fibrous lesion affecting maxillary and mandibular bones and only rarely, the cranial bones. Giant cell reparative granuloma of the posterior ethmoid is exceedingly rare. To the best of our knowledge none of such case has been previously reported. Being a soft fleshy lesion of bone, if tends to have a benign course, not aggressive, it often recurs following incomplete excision. We report the case of a woman with a GCRG of right posterior ethmoid. We discuss the clinical picture, differential diagnosis, histologic evaluation and appearance on computed tomography.