造釉细胞纤维瘤是一种罕见的肿瘤,由增生的牙源性上皮及类似于牙乳头的富有细胞的间叶组织组成。肿瘤有时也可以表现出明显的诱导图象,如上皮岛或条索周围的无细胞带;上皮周围的无定形玻璃样物质带;无钙化的牙本质样或骨样牙本质围绕上皮岛。出现这些诱导现象时,Pindbory和Clauusen(1958)称为非成熟型牙本质瘤;Gorlin等(1961)称为造釉细胞纤维型牙本质瘤;Eversole等(1971)则称它为造釉细胞纤维瘤伴有牙本质样物质形成。造釉细胞纤维瘤的“诱导”现象,在光镜方面已有报道,但其电镜方面的研究尚未见报道,因此作者首次报告了此瘤的光镜和电镜研究结果。材料为8岁男性患者,右下颌体部肿瘤,术前活检诊断为造釉细胞纤维瘤。术后 Ameloblastoma is a rare tumor consisting of a hyperplastic odontogenic epithelium and a rich cell-like mesenchymal tissue resembling a dental papilla. Tumors may also sometimes show markedly inducing images, such as epithelial cells or cell-free bands around the cord; amorphous glassy material bands around the epithelium; calcified dentin-like or bone-like dentin surrounding the epithelial island. When these inductions occur, Pindbory and Clausen (1958) are called immature dentine tumors; Gorlin et al. (1961) are called ameloblastic dentin tumors; Eversole et al. (1971) call it ameloblastic fibers. The tumor is accompanied by dentin-like material formation. The “induction” phenomenon of ameloblastoma has been reported in light microscopy, but its electron microscopy studies have not been reported yet. Therefore, the author first reported the results of light microscopy and electron microscopy of this tumor. The material was an 8-year-old male patient with a tumor of the right mandibular body. A preoperative biopsy was diagnosed with ameloblastoma. Postoperative