歯原性上皮由来の下顎骨中心性粘表皮腫と考えられた1例

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Mucoepidermoid tumorous transformation in odontgenic cysts seems to be an extremely rare phenomenon. A case of central mucoepidermoid tumor arising in the wall of an odontgenic cyst in the left premolar area of the mandible of a 37-year old woman is reported.<BR>She, apparently in good health, was referred with gingiva bleeding. Oral examination revealed periodontal disease of the teeth. However, radiographic examinations confirmed the presence of a radiolucent area in the left premolar area of mandible. Moreover, excisinal biopsy revealed a low grade mucoepidermoid tumor. The entire tumor was located above the inferior dental canal. Furthermore, the lingual cortical plate remained intact and the submaxillary gland was not involved by the tumor. A lot of large and small cystic regions were scattered and small islands of mucous and squamoid cells were present in the connective tissue stroma. It was conceivable that our case originated from the pluripotential epithelial lining of an odontogenic cyst.
社団法人日本口腔外科学会の論文