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造釉细胞纤维肉瘤是一种由增生的牙源性上皮组成的,同时又显示了肉瘤特点的肿物。上皮成分埋在类似于牙乳头的中胚层组织中,但不形成牙组织。在牙源性肿瘤中纤维肉瘤极少见,迄今为止在英、日文献中仅见30例报告。本文报告2例造釉细胞纤维肉瘤并详细描述电镜和光镜的形态学所见。光镜所见:肿瘤由分散的上皮细胞滤泡或条索和富于细胞的成纤维组织构成。滤泡或条索周缘细胞呈柱状或立方状,中心细胞呈星形,与造釉细胞瘤中所见类似。上皮成分无恶性证据,纤维成分富含细胞且见多形
Ameloblastic fibrosarcoma is a hyperplastic odontogenic epithelium and shows a tumor characterized by sarcoma. Epithelial components are buried in mesoderm tissue similar to the dental papilla, but no dental tissue is formed. Fibrosarcoma is rarely seen in odontogenic tumors. So far only 30 cases have been reported in the British and Japanese literature. This paper reports two cases of ameloblastomas and describes in detail the morphology of electron microscopy and light microscopy. As seen by light microscopy, the tumor consists of scattered epithelial cells, follicles or cords, and cell-rich fibroblasts. The cells around the follicles or strips are columnar or cubic, and the central cells are star-shaped, similar to those seen in ameloblastomas. There is no evidence of malignant epithelial components. Fibers are rich in cells and they are polymorphic.