下顎骨に発生した類腱線維腫の1症例

概要

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Desmoplastic fibroma in the jaw bones is a rare tumor which shows small fibroblasts and abundant collagen fibers histologically.<BR>A 16-year-old female with a desmoplastic fibroma in the mandible is presented. She was referred to us for treatment of an osteolytic lesion in the left mandible. X-ray examination revealed a well-defined region of unicystic radiolucency, associated with another small region antero-inferiorly, extending from the second premolar to the second molar. As examination of a biopsy specimen indicated fibroma, tumor enucleation was performed followed by thorough curettage. The tumor had an elastic hard consistency and measured 33×20×10mm. The cut surface was solid, greyish white. Histologically, the tumor tissue was composed of scattered small fibroblasts with narrow, elongated nuclei and abundant, dense collagen fibers showing intertwining fibrous fascicles. Odontogenic epithelium, a tooth-bud-like structure and calcifying tissue were not noted.<BR>The postoperative course was uneventful, and no recurrence has occurred for nine years.