石灰化歯原性嚢胞の1例とその文献的考察

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The calcifying odontogenic cyst first reported by Gorlin et al. in 1962 has been considered to be a comparatively rare disease.<BR>The histo-pathological findings were characterized by appearance of ghost cell and calcareous deposits on the cyst wall epithelial layer.<BR>Recently, we treated a large cyst which developed on the right maxillary bone of a 25-year-old male. At the first diagnosis with X-ray, it was suspected to be globulomaxillary or maxillary cyst, but the histo-pathological diagnosis indicated it was calcifying odontogenic cyst.<BR>Now, 85 cases of this lesion have been reported in Japan and their literatures have been considered. The fact that complications with odontogenic tumor as odontoma or ameloblastoma were found in 29 cases suggests that this lesion has a relation to these odontogenic tumors. Generally, this lesion has various foci structures, such as tooth-like hard tissues formations, mono or multilocular cysts, impacted teeth, and granular X-ray lucency, therefore clinical diagnosis is very difficult. Some cases which have apparent tumorous characteristics in histopathological findings such as recurrence or malignancy have been reported in the literature. Therefore, it seems to be necessary to discuss a new classificational position.<BR>This patient has a good prognosis after the extirpating operation, so we reported the details of this case.