セメント質腫の臨床的病理組織学的検索根尖性セメント質異形成症ならびにセメント質腫の塊状増殖病変について

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Although cementoma is one of the odontogenic tumors, its pathological features are complicated and sometimes difficult to distinguish from bone diseases. So it is categorized as a fibro-osseous lesion. According to the WHO classification, it is classified into four lesions. However we sometimes encounter the lesions of a mass composed only of the cementum which is not described in above classification.<BR>In the present report, we studied 9 cases of periapical cemental dysplasia and 13 cases of massive lesion which we had experienced in our department.<BR>Both lesions occured in middle-aged and old women and ivolved mandibular molar regions. Radiologically, they appeared as well defined opaque figures circumscribed by thin lucent zones. The lesions located in the periapical regions were smaller than those located in the edentulous regions. Periapical cemental dysplasias produced various combinations of trabecular, spherical hard tissues and they fused to become large masses. Various stages of maturation could be seen in each hard tissue. Massive cemental lesions affected older patients more often than the periapical cemental dysplasias. Histologically, the lesion consisted of a large cemental mass, resembling mature bone. Most of the lesions were infected and associated with abscess.<BR>We found a process of development from periapical cemental dysplasia to massive cemental lesions, but there still remain many problems before concluding that the latter lesion is the mature inactive stage of the former lesion.
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セメント質腫の臨床的病理組織学的検索根尖性セメント質異形成症ならびにセメント質腫の塊状増殖病変について

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セメント質腫の臨床的病理組織学的検索 根尖性セメント質異形成症ならびにセメント質腫の塊状増殖病変について

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セメント質腫の臨床的病理組織学的検索根尖性セメント質異形成症ならびにセメント質腫の塊状増殖病変について