特異な石灰化物を伴った歯原性粘液線維腫の1例

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In this paper, a 16 year old male case of odontogenic myxofibroma with peculiar calcareous substances in the lower left molar region and mandibular ramus was reported. He had suffered from a swelling without pain in this region. Radiographic examination revealed a multilocular and radiolucent lesion containing a mandibular third molar and uncertain cloudy radiopaque shadows. Boundary of the lesion was radiographically comparatively clear. Extraction of the second molar and removal of the tumor were performed under general anesthesia. The tumor was 6.5×3. 5×4.0cm in size, trancelucent and light brown color, smooth surfaced with soft consistency and cystic lumens containing viscoid fluid.<BR>Thin calcareous substances were scattered in the tumor.<BR>Microscopically, the tumor consisted of dense fibrous connective and myxomatous tissues. Tumor cells were stellate or spindle shaped, but mitotic figure was not seen. The tumor contained numerous peculiar calcareous substances which varied in size and were of unknown origin. The tumor was diagnosed odontogenic myxofibroma because of the existence of epithelial islands of odontogenic origin and continuation between dental sac of the embedded third molar and tumor tissue. No recurring after treatment.
社団法人日本口腔外科学会の論文