CASE REPORT Primary Intraosseous Meningioma of the Mandible: CT and MR Imaging Features

SUMMARY: We describe the rare entity of an intraosseous meningioma arising in the mandible. The meningioma was found incidentally in an asymptomatic adult patient on dental radiography, mimicking other cystic-appearing jaw masses. The CT and MR imaging features of mandibular meningioma are reviewed with reference to prior published descriptions of this unusual entity. Primary intraosseous meningiomas are rare. To the best ofour knowledge, only 3 cases involving the mandible have been reported; all were imaged with conventional radiogra-phy. We present the cross-sectional CT and MR imaging fea-tures that help to differentiate this tumor clearly from the more common cystic lesions of the mandible. Case Report A 40-year-old asymptomatic woman was referred to an oral surgeon because of an incidental finding of a lytic mandibular lesion. A dental film, obtained to assess the dental status, demonstrated a well-defined lucency in the right mandible. The patient’s medical history was un-remarkable. Clinical examination revealed a bulge of the right man