骨巨细胞瘤是我国较常见的带有侵袭性的肿瘤,为我国骨肿瘤的一个重点研究课题。国内外文献对此肿瘤已有较多报导,但争论的问题也较多。焦点在于:骨巨细胞瘤的生物学特性是良性还是恶性?瘤细胞由何来源?鉴于国内对此肿瘤超微结构研究的报导不多。特别是结合病理分级的电镜报告尚未见到。本文选择病理Jaffe氏分级为Ⅱ级的瘤组织进行了初步 Giant cell tumor of bone is more common in our country with invasive tumors, bone tumors in our country a key research topic. Domestic and foreign literatures have reported more on this tumor, but there are more controversial issues. The focus is: the biological characteristics of giant cell tumor of bone is benign or malignant? Source of tumor cells? In view of the domestic research on the ultrastructure of this tumor is not much reported. In particular, combined with pathological grading electron microscopy report has not yet seen. In this paper, the pathological selection of Jaffe’s grade Ⅱ tumor tissue was preliminary