下顎筋突起部の骨軟骨腫-自験例と文献的考察-

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A case of unilateral enlargement of the coronoid process of the mandible was presented. The patient was a 37-year-old female and she complained of restricted mandibular movement and swelling of the left zygomatic region. A routine X-ray examination revealed a bony mass at the tip of the left coronoid process. A coronoidectomy was performed intraorally so that the restricted mandibular movement was improved. Computed tomography was extremely useful not only in the diagnosis of this condition but also in deciding the surgical procedure. Histologically, the specimen showed a proliferation of cartilage cells existed in a disordinary arrangement, in general, and enchondral ossification was markedly disturbed, but there was not any degree of cellular pleomorphism or atypia. The histological diagnosis of osteochondroma of the coronoid process was obtained.<BR>The nature of this condition has been obscure. Although the majority of reported cases lack the histological evidence of the neoplastic nature, some show a proliferation of the cartilage, cellular pleomorphism or slight atypia of the cartilage cells. Our case suggests this condition has a basically neoplastic nature.
社団法人日本口腔外科学会の論文