骨母细胞瘤较少见,据大宗资料统计,约占所有骨肿瘤的1％左右,我科近二十年有病理诊断的455例骨肿瘤中,见到此瘤1例(0.22％)。有关此瘤以往曾以良性对待,七十年代以来渐有“良性、恶性(侵袭性)及明显恶性”之例报告。国内81年,报告二例多次复发,具恶性特征,后有肺转移,终至死亡,对本瘤的性质迄今文献报告尚少, Osteoblastoma is rare. According to the statistics of bulk materials, it accounts for about 1% of all bone tumors. One case (0.22%) of the 455 bone tumors with pathological diagnosis in our department in recent 20 years was found. In the past, this tumor has been treated benignly, and since the seventies, there have been “benign, malignant (aggressive) and malignant” cases. For the past 81 years in China, two cases of recurrent multiple recurrences with malignant features, followed by lung metastasis and death, have reported little on the nature of this tumor so far,