下顎小臼歯部に発生した骨形成を伴う巨細胞エプーリスの1例

Abstract

Giant cell epulis (peripheral giant cell granuloma) is a granuloma consisting of a large number of multinucleated giant cells. Its incidence is high in Europe and the United States, but is very low in Japan. Giant cell epulis accompanied by bone formation is extremely rare in Japan. We report a case of giant cell epulis accompanied by bone formation. A 46-year-old woman visited our hospital because of a mass in the left mandibular molar region. There was a well-demarcated, pedunculated mass in the left mandibular molar region. The mass was excised under the clinical diagnosis of epulis. Histopathologically, the resected specimen consisted of spindle cells resembling fibroblasts and many multinucleated giant cells. Moreover, newly synthesized bone was observed in the center of the mass. The pathological diagnosis was a giant cell granuloma. Two years six months after the operation, there has been no evidence of recurrence.